Sun-Dried Tomato & Spinach Stuffed Conchiglioni (Baked)

The Pasta That Feels Like a Sunday Afternoon

Have you ever pulled a baking dish out of the oven and just stood there for a second, breathing in the steam, before you even grabbed a spoon? That is the moment I live for, and these sun-dried tomato and spinach stuffed conchiglioni deliver it every single time. The shells come out bubbling, the cheese is golden in spots, and the kitchen smells like Sunday afternoon at my grandmother’s house — tomato, garlic, and basil drifting through every doorway.

Stuffed pasta used to intimidate me. I had a vision of noodles tearing, filling leaking, and an unphotogenic mess sliding into the oven. Then I learned three small things: par-cook the shells a few minutes shy of al dente, drain them upside-down on a towel so the water runs out, and stuff them gently with a small spoon (or a piping bag, if you are feeling fancy). That is the whole trick. Everything else is just good ingredients and a little patience while the oven does its work.

What I love about this version is the way the sun-dried tomatoes sneak brightness into an otherwise rich, creamy filling. They are a little sweet, a little tangy, and a little chewy — exactly the counterpoint the spinach-and-ricotta filling needs. The whole thing comes together in about an hour, but most of that is hands-off oven time, which means you can pour a glass of wine, set the table, and let dinner take care of itself. Ready to make a baking dish disappear in twenty minutes flat?

Sun-Dried Tomato and Spinach Stuffed Conchiglioni

This is a cozy, make-ahead-friendly baked pasta featuring jumbo conchiglioni shells stuffed with a creamy ricotta-spinach filling studded with sun-dried tomatoes, baked in a simple tomato sauce and topped with melted mozzarella and parmesan. It uses everyday ingredients, freezes beautifully, and feeds a hungry table of six with leftovers for lunch the next day. The flavor is rich and savory, the texture contrasts between the silky filling, the tender pasta, and the cheesed top is everything, and it reheats without losing a step — which is half the point of any good baked pasta.

What makes this version work is the filling. You squeeze the spinach bone dry before mixing it in, otherwise the ricotta thins out and the shells turn watery in the oven. A single egg binds everything, the parmesan brings salt and depth, and a grating of fresh nutmeg at the end is the secret — it makes the ricotta taste like it should. If you have enjoyed my other baked pasta recipes, this one is going to be a Sunday regular.

From Pot to Plate: My Step-by-Step Method

Step 1: Cook the shells. Bring a big pot of well-salted water to a rolling boil. Drop the conchiglioni in and cook them about 3 minutes shy of the package time — they finish cooking in the oven. Drain and gently toss with a teaspoon of olive oil to keep them from sticking. Spread them on a clean kitchen towel to cool, flipping once so any water inside drains out. The drier they are now, the better they will hold the filling.

Step 2: Wilt the spinach. While the pasta cooks, heat a tablespoon of olive oil in a small skillet over medium heat. Add the minced garlic and cook just until fragrant, about 30 seconds. Add the spinach in handfuls, stirring until each batch wilts before adding more. Once cooled, squeeze the spinach in a clean tea towel until very dry — this is the step that prevents a watery filling. Chop finely and set aside.

Step 3: Make the tomato sauce. In the same skillet, add another tablespoon of olive oil. Sauté the chopped onion until soft, about 5 minutes. Add the garlic and stir for 30 seconds. Pour in the crushed tomatoes, season with salt, pepper, and a pinch of sugar, and add the basil leaves. Simmer gently for about 10 minutes until thickened slightly. Remove the basil and taste — the sauce should be bright and well-seasoned.

Step 4: Mix the filling. In a large bowl, combine the ricotta, chopped sun-dried tomatoes, grated parmesan, beaten egg, the chopped spinach, a grating of fresh nutmeg, and a generous pinch of salt and pepper. Mix until just combined — overmixing makes the filling dense. Taste a small spoonful and adjust the seasoning. The filling should be savory, slightly tangy, and richly herbed.

Step 5: Stuff and assemble. Preheat the oven to 375°F. Spread half the tomato sauce in the bottom of a 9×13-inch baking dish. Using a small spoon (or a piping bag for the tidy version), fill each shell with about 2 tablespoons of the ricotta mixture and nestle them into the sauce, opening side up. They can touch — that is fine. Spoon the remaining sauce over and around the shells, then scatter the mozzarella and extra parmesan on top.

Step 6: Bake covered, then uncovered. Cover the dish tightly with foil and bake for 25 minutes, until the shells are tender when pierced with a knife. Remove the foil and bake another 10 to 15 minutes, until the cheese is golden and bubbling at the edges. Let it rest for 10 minutes before serving — this is crucial, the filling needs time to set or it will run when you scoop.

Creative Twists

This pasta is wonderfully forgiving once you have the base down. A few favorites I have tested:

• Brown butter and sage: Skip the tomato sauce and bake the shells in a simple brown butter and sage situation. Cozy and a little fancy.
• Spicy arrabbiata: Add a pinch of red pepper flakes and a spoon of calabrian chile paste to the tomato sauce. The heat plays beautifully with the creamy filling.
• Four-cheese upgrade: Stir fontina and a little mascarpone into the ricotta filling. Top with gruyère instead of mozzarella for a deeper, nuttier finish.
• Use butternut squash: Swap the spinach for roasted butternut squash puree in the filling. Add a pinch of sage. Perfect for fall.
• Go meaty: Stir cooked Italian sausage or pancetta into the tomato sauce for a heartier version that does not need a side dish.

Serving and Pairing Ideas

What should I serve with stuffed conchiglioni? Almost nothing — the pasta is the show. A simple arugula salad with shaved parmesan, lemon, and good olive oil cuts through the richness beautifully. Warm crusty bread for sweeping up the sauce is a given. For wine, a Chianti or Sangiovese is the classic call, but a barbera works just as well. A sparkling lemon water with a sprig of basil is the right non-alcoholic pairing.

Why I Love This Recipe

There is a reason I make this baked pasta more often than almost any other dish in my kitchen. It is the recipe I lean on when friends come for dinner and I want to feel like I cooked something real. It is the recipe I make on a Sunday when I want the house to smell like a proper home. The ingredient list is short, the steps are forgiving, and the result looks like you tried much harder than you did.

I also love that it is the rare baked pasta that actually gets better as it sits. The tomato sauce seeps into the shells overnight, the ricotta filling firms up, and the cheese topping turns almost frico-like. Which means I genuinely look forward to the leftovers, which is something I cannot always say about a baked pasta. Speaking of which — let us talk about make-ahead and storage.

Storage and Batch Cooking

This pasta keeps in the fridge for up to four days in a covered container. To reheat, cover with foil and warm in a 350°F oven for about 20 minutes, until heated through. The microwave works in a pinch, but the oven keeps the cheese topping from going rubbery.

For make-ahead, assemble the entire dish up through topping with cheese, cover tightly, and refrigerate unbaked for up to two days. Bring to room temperature for 20 minutes, then bake as directed (you may need to add 10 minutes to the covered bake time). The unbaked casserole also freezes beautifully for up to three months — thaw in the fridge overnight before baking. You can also freeze individual portions for fast weeknight dinners.

Troubleshooting Your Sauce

A few things that can go sideways, and how to fix them:

• The filling is watery. Almost always, the spinach was not squeezed dry enough. Next time, wrap it in a clean tea towel and really press — you should be surprised by how much water comes out.
• The shells cracked while stuffing. They were either overcooked or you pressed too hard. Par-cook 3 minutes under the package time, and use a piping bag for the tidiest results.
• The dish is dry after baking. You probably used too much pasta or not enough sauce. Make sure the shells are mostly submerged in the sauce before baking, and add a splash of water if the sauce tightens up too much.
• It tastes flat. Almost always salt or acid. A pinch more parmesan in the filling, a pinch more salt in the sauce, and a grating of lemon zest over the top before serving will wake everything up.

Your Quick Questions, Answered

Can I use regular shells instead of conchiglioni? Absolutely. Jumbo pasta shells are basically the same shape, just a bit smaller. Stuff them with a little less filling and reduce the covered bake time by about 5 minutes.

Do I have to use fresh spinach? Not at all. Frozen chopped spinach works perfectly — just thaw it first and squeeze out as much water as you possibly can. About 10 ounces of frozen, thawed, and squeezed is the equivalent of the fresh.

Can I make this ahead for a dinner party? Yes — this is one of the best make-ahead pastas. Assemble through the cheese topping, cover, and refrigerate for up to 2 days. Bake just before guests arrive. The resting time after baking actually helps the dish come together.

What if I do not have sun-dried tomatoes? You can use a cup of halved cherry tomatoes sautéed until they burst, or roasted red peppers chopped fine. The flavor will shift a little, but it will still be lovely.

Can I freeze the unbaked casserole? Yes, for up to three months. Wrap tightly in two layers of foil. Thaw in the fridge overnight, then bring to room temperature for 20 minutes before baking as directed.

A Few Last Thoughts

If you have been hunting for a baked pasta that feels a little bit special but does not ask for your whole afternoon, these sun-dried tomato and spinach stuffed conchiglioni are it. They are the recipe I make when friends come for dinner, when I want the house to smell like Sunday, when I want leftovers I genuinely look forward to the next day.

So grab a baking dish, get the water boiling, and let the oven do the heavy lifting. And if you make it, I would love to hear how it turned out — did you add the nutmeg like I do? Did you swap in sausage or butternut squash? Drop me a note in the comments and tell me all about it. Happy cooking, friends.

—Elowen Thorn