Ground Beef Stuffed Shells
There’s something comfortingly generous about giant pasta shells cradling a rich, savory filling—each bite a little parcel of cheesy, herby goodness. This Ground Beef Stuffed Shells recipe brings together tender pasta, a creamy cottage-cheese mixture, spinach, and perfectly seasoned ground sirloin, all simmered in bright marinara and topped with melty mozzarella and a sprinkle of parmesan and fresh basil. It’s a weeknight dinner that feels celebratory, an easy make-ahead meal for gatherings, and an ideal crowd-pleaser when you want something hearty without fuss.
Why you’ll love these stuffed shells
These shells are a hit for several reasons: they’re loaded with crowd-pleasing flavors—garlic, Italian seasoning, red pepper flake for a hint of heat—plus the combination of cottage cheese, egg, and mozzarella keeps the filling creamy and cohesive. Ground sirloin gives a robust, beefy base that pairs beautifully with the bright tomato sauce and fresh basil. The recipe uses about 27–29 jumbo shells, which means each batch yields generous portions that are perfect for feeding a family or bringing to a potluck.
Ingredients
- ▢27-29 jumbo shells
- ▢10 oz. frozen chopped spinach, thawed and excess liquid squeezed out
- ▢2 c small curd cottage cheese
- ▢1 large egg, lightly beaten
- ▢3 c shredded mozzarella, divided
- ▢½ c grated parmesan
- ▢3-4 garlic cloves, minced
- ▢1 T Italian seasoning
- ▢½ tsp salt
- ▢½ tsp cracked pepper
- ▢¼ tsp crushed red pepper
- ▢1 lb. ground sirloin
- ▢1 onion, small diced
- ▢28 oz. marinara sauce
- ▢¼ c fresh basil, chopped
Make-ahead and serving tips
If you want to prep this in advance, assemble the shells in the baking dish, cover tightly, and refrigerate for up to 24 hours before baking. You can also freeze the assembled and covered dish for up to 2 months—thaw overnight in the refrigerator before baking. Serve with a crisp green salad and crusty bread to sop up the marinara.
Equipment
- Large pot for boiling pasta
- Large skillet
- Colander
- Mixing bowls
- 9×13-inch baking dish (or similar)
- Aluminum foil
- Spoon or small spatula for filling shells
Flavor notes and swaps
If you prefer milder flavors, reduce the crushed red pepper or omit it. For extra herbiness, stir a bit more chopped basil into the filling. If cottage cheese isn’t your favorite texture, you can use ricotta in the same quantity for a smoother filling. Lean ground beef works fine if you prefer it to ground sirloin.
Step-by-step directions
Below are clear, sequential instructions that follow the ingredient list and keep the overall order intact. Read through once before you start so everything flows smoothly.
- Preheat and prep: Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish (or a similarly sized casserole dish) and set it aside.
- Cook the pasta shells: Bring a large pot of salted water to a boil. Add 27–29 jumbo shells and cook until just al dente according to package directions—usually a minute or two less than fully tender so they hold their shape when stuffed. Drain shells in a colander and transfer them to a sheet pan or a single layer on a towel so they don’t stick together while you prepare the filling.
- Prepare the spinach: Thaw the 10 oz. frozen chopped spinach and then squeeze out any excess liquid using a clean kitchen towel or several layers of paper towels. Transfer the drained spinach to a bowl and set aside.
- Cook the beef and onion: Heat a large skillet over medium heat. Add the 1 lb. ground sirloin and the small diced onion. Cook, stirring and breaking up the meat, until the beef is cooked through and the onion is softened, about 6–8 minutes. If there is excess fat in the pan, drain it off. Stir in 3–4 minced garlic cloves and cook for about 30 seconds until fragrant. Remove the skillet from heat and allow the mixture to cool slightly.
- Mix the filling: In a large mixing bowl, combine the drained spinach, 2 cups small curd cottage cheese, 1 lightly beaten large egg, 2 cups of the shredded mozzarella (reserve 1 cup for topping), ½ cup grated parmesan, 1 tablespoon Italian seasoning, ½ teaspoon salt, ½ teaspoon cracked pepper, and ¼ teaspoon crushed red pepper. Add the cooked ground sirloin, diced onion, and garlic to the bowl and stir until everything is evenly distributed. Taste the filling and adjust seasoning if needed.
- Prepare the sauce layer: Pour about half of the 28 oz. marinara sauce into the prepared baking dish and spread it into an even layer. This creates a saucy base so the shells don’t stick and so they bake into a bubbling, flavorful casserole.
- Stuff the shells: Using a small spoon, carefully fill each cooked jumbo shell with roughly 2–3 tablespoons of the cottage cheese and beef mixture. Arrange the filled shells upright in the baking dish on top of the marinara, packing them in snugly but without squashing them—aim for 27–29 shells depending on your pan size.
- Top with sauce and cheese: Spoon the remaining marinara sauce over the shells, covering them evenly. Sprinkle the remaining 1 cup shredded mozzarella over the top and follow with any additional parmesan if you like.
- Bake: Cover the baking dish tightly with aluminum foil and bake in the preheated 375°F oven for 25 minutes. After 25 minutes, remove the foil and bake an additional 10–15 minutes, until the cheese on top is melted and bubbly and the dish is heated through.
- Finish and rest: Remove the baked shells from the oven and let them rest for 5 minutes. Sprinkle the ¼ cup chopped fresh basil over the top before serving for a bright, fresh finish.
Hands-on timing
- Active prep: about 25–35 minutes (boiling shells, cooking beef and onion, mixing filling)
- Bake time: 35–40 minutes
- Total time: about 1 hour to 1 hour 15 minutes
Serving suggestions
These stuffed shells pair beautifully with a simple green salad tossed in a lemon vinaigrette or a classic Caesar. Garlic bread or warm focaccia are great for sopping up extra sauce. For a lighter accompaniment, roasted vegetables like asparagus or broccoli make a nice contrast to the rich, cheesy shells.
Storing and reheating
Refrigerate leftovers in a covered container for up to 3 days. Reheat individual portions in the microwave or warm the entire dish covered with foil in a 350°F oven until heated through, about 20–30 minutes. For freezing, wrap the cooled, assembled but unbaked dish tightly and freeze for up to 2 months. Thaw overnight in the refrigerator before baking according to the directions above.
Common questions
Can I use fresh spinach instead of frozen? Yes. If using about 10 oz. fresh spinach, wilt it down in a skillet, then squeeze out the excess moisture and measure roughly the same drained quantity before adding to the filling.
What if I don’t have cottage cheese? Ricotta is a 1:1 substitute and will give a smoother texture to the filling. Use the same 2 cups measurement.
Can I make this vegetarian? Absolutely—swap the ground sirloin for a plant-based ground meat alternative or a mix of sautéed mushrooms, lentils, and walnuts for a hearty, meaty texture without beef.
Final thoughts
These Ground Beef Stuffed Shells hit all the high notes: comforting, cheesy, and full of savory flavor. They’re flexible enough for weeknight dinners but special enough for guests. The recipe’s clear steps make assembly simple, and the make-ahead and freezing options are perfect for busy cooks who want to plan ahead. With a golden cheese top and bright ribbons of basil, this is the kind of dish that earns repeat requests—and who could blame anyone for that?
Enjoy the process, savor the aromas while it bakes, and don’t forget a fork and plenty of napkins—these stuffed shells are delightfully saucy and worth every delicious bite.
Ground Beef Stuffed Shells
Ingredients
Equipment
Method
- Thaw the frozen chopped spinach and squeeze out all excess liquid until dry; set aside.
- In a mixing bowl combine the drained spinach, 1 1/2 cups shredded mozzarella, grated Parmesan, cottage cheese, lightly beaten egg, minced garlic, Italian seasoning, salt, cracked pepper, and crushed red pepper; stir until well combined and set aside.
- Bring a large pot of salted water to a boil and cook the jumbo pasta shells until just under al dente (about 1 minute less than package instructions). Drain, rinse with cool water to stop cooking, toss very lightly with a little olive oil to prevent sticking, and arrange in a single layer on a parchment-lined baking sheet.
- Heat a large skillet over medium-high heat with a drizzle of olive oil. Add the diced onion and sauté until translucent, about 3–4 minutes.
- Add the ground sirloin to the skillet, break it up, and cook until no longer pink, about 7–10 minutes; drain excess grease. Remove half of the cooked meat and stir it into the spinach-cheese mixture; reserve the other half for the marinara topping.
- Preheat the oven to 350°F (175°C). Pour 1 1/2 cups marinara sauce into the bottom of a lightly sprayed 9×13-inch baking pan and spread evenly.
- Mix the remaining cooked ground beef and onions into the remaining marinara to make the meat sauce for topping.
- Stuff each cooked jumbo shell with about 2 1/2–3 tablespoons of the spinach, cheese, and meat filling and place the shells open-side up in the prepared baking pan in an even layer.
- Pour the meat-marinara sauce over the stuffed shells to cover them, then sprinkle the remaining 1 1/2 cups shredded mozzarella evenly over the top and cover the pan with foil.
- Bake covered for 25–30 minutes until bubbling, then remove the foil and bake an additional 10 minutes until the cheese is melted and slightly golden.
- Sprinkle chopped fresh basil over the shells, let cool for 5–10 minutes, then serve.
Notes
- Cool completely before freezing baked leftovers in an airtight, freezer-safe container.
- To freeze before baking, omit the shredded topping cheese and cover shells completely with marinara.
- Bake from frozen at 350°F for 50–60 minutes, adding shredded cheese in the last 10 minutes.
- Allow partially thawed frozen dish to reach room temperature slightly before baking for even heating.
