Equipment
* optional
Ingredients
Pasta and Sauce
- 200 g jumbo pasta shells, dry
- 600 ml marinara sauce
Ricotta and Spinach Filling
- 400 g whole milk ricotta cheese, drained if watery
- 250 g frozen spinach, thawed
- 200 g low-moisture mozzarella cheese, shredded
- 50 g parmesan cheese, grated
- 1 egg, lightly beaten
- 2 garlic, minced
- 5 g kosher salt
- 2 g black pepper, freshly ground
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 648 kcal
- Protein
- 37 g
- Carbohydrates
- 63 g
- Fat
- 28 g
- Fiber
- 6 g
- Sugar
- 10 g
- Sodium
- 1799 mg
- Saturated Fat
- 15 g
- Trans Fat
- 1 g
- Monounsaturated Fat
- 7 g
- Polyunsaturated Fat
- 3 g
- Cholesterol
- 139 mg
- Potassium
- 1166 mg
- Calcium
- 846 mg
- Iron
- 4.6 mg
- Magnesium
- 142 mg
- Phosphorus
- 720 mg
- Zinc
- 4.2 mg
- Vitamin A
- 692 mcg
- Vitamin C
- 7 mg
- Vitamin D
- 0.7 mcg
- Vitamin E
- 6.0 mg
- Vitamin K
- 256 mcg
- Vitamin B6
- 0.7 mg
- Vitamin B12
- 1.9 mcg
- Thiamin
- 0.56 mg
- Riboflavin
- 1.00 mg
- Niacin
- 10.1 mg
- Folate
- 253 mcg
- Water
- 305 g
Sources: USDA FoodData Central
Method
Preheat your oven to 190 C (375 F). Lightly grease a 9x13 inch baking dish.
Bring a large pot of heavily salted water to a boil. Add the jumbo pasta shells and cook for 2 minutes less than the package directions indicate, ensuring they remain slightly firm. Drain carefully and rinse with cold water to stop the cooking process and prevent sticking.
Place the thawed spinach into a clean kitchen towel. Twist and squeeze the towel over a sink to wring out as much water as physically possible. Fluff the dry spinach with a fork.
In a large mixing bowl, combine the drained ricotta, the thoroughly dried spinach, 150g of the shredded mozzarella, grated parmesan, beaten egg, minced garlic, kosher salt, and black pepper. Stir vigorously until the mixture is homogeneous.
Spread roughly 300ml of marinara sauce evenly across the bottom of the prepared baking dish. Open each cooled pasta shell and fill generously with the ricotta-spinach mixture. Arrange the stuffed shells open-side up in the baking dish.
Spoon the remaining 300ml of marinara sauce over the stuffed shells, ensuring the exposed edges of the pasta are coated to prevent them from drying out. Sprinkle the remaining 50g of mozzarella cheese evenly over the top.
Cover the baking dish tightly with aluminum foil. Bake in the preheated oven at 190 C (375 F) for 20 minutes. Remove the foil and bake for an additional 10 to 15 minutes until the sauce is bubbling at the edges and the cheese is completely melted.
Remove the baking dish from the oven and allow the stuffed shells to rest for 5 minutes before serving. This brief cooling period helps the cheese filling set up so it does not spill out upon serving.
Chef's Notes
- Always undercook the pasta shells by 1 to 2 minutes during the boiling phase. They will continue to cook and absorb flavorful liquid while baking in the marinara sauce, ensuring they don't turn mushy.
- Moisture control is the secret to perfect stuffed shells. Squeezing the thawed spinach is arguably the most critical step; do not rely on your hands alone. Use a towel or cheesecloth for maximum leverage.
- If your ricotta is particularly watery, line a strainer with cheesecloth or a coffee filter, place it over a bowl, and let the ricotta drain in the refrigerator for a few hours before mixing.
- Make-ahead tip: You can assemble this entire dish up to 2 days in advance. Keep it tightly covered in the refrigerator and simply add 10 extra minutes to the covered baking time.
Storage
Refrigerator: 4 days — Cover tightly with foil or store in an airtight container.
Freezer: 3 months — Freeze unbaked or baked. If freezing unbaked, do not thaw before baking; simply add 15-20 minutes to the covered baking time.
Reheating: Reheat individual portions in the microwave for 2 minutes, or cover the entire dish with foil and bake at 175 C (350 F) until warmed through.
Troubleshooting
Watery sauce in the bottom of the baking dish
Cause: The frozen spinach was not squeezed dry completely, releasing excess moisture during baking.
Fix: Remove the foil cover early and increase the baking time by 5 to 10 minutes to allow excess liquid to evaporate.
Prevention: Use a clean kitchen towel to tightly wring out the thawed spinach until absolutely no water remains before adding it to the cheese mixture.
Pasta shells tore while stuffing
Cause: The pasta was fully cooked rather than boiled to al dente, making it too delicate.
Fix: Piece the torn shells back together in the dish; the filling and melted cheese will hold them intact once baked.
Prevention: Always undercook the pasta shells by 2 minutes relative to package instructions.
Exposed edges of pasta are hard and crunchy
Cause: Pasta edges were not properly covered with sauce or foil was not sealed tightly.
Fix: Cannot be easily fixed once completely dried out, but hard edges can simply be discarded while eating.
Prevention: Ensure all exposed pasta is gently painted or dabbed with marinara sauce before baking.
Cultural Context
Stuffed shells, or conchiglioni ripieni, originated in the Campania region of Italy where large, extruded pasta shapes were intentionally developed to cradle robust meat and cheese fillings. This style of baked pasta, broadly categorized as pasta al forno, became an iconic Italian-American classic due to its comforting, substantial nature and unparalleled adaptability for large family gatherings.
