01 -
Set the oven to 375°F and let it heat up.
02 -
Boil the pasta shells in salted water until they're slightly firm. Drain them and set aside.
03 -
In a skillet, sauté the beef with garlic and oregano until browned. Remove it from the heat.
04 -
Combine the cooked beef with ricotta, 1 cup mozzarella, Pecorino Romano, egg, salt, and pepper in a bowl.
05 -
Pour 1 cup of the tomato sauce into an oven-safe dish, then fill each shell with the prepared mixture. Lay them side by side in the dish.
06 -
Cover the stuffed shells with the leftover sauce and sprinkle the remaining mozzarella on top.
07 -
Keep the dish covered and bake for 25 minutes. Uncover and bake another 10 minutes until the cheese is bubbly and golden.
08 -
Add a sprinkle of fresh parsley on top and enjoy while it's hot.