01 -
Set your oven to 375°F to preheat.
02 -
Boil the shells in salted water until slightly firm to the bite, then drain and set aside.
03 -
Brown the ground beef in a pan with garlic and oregano. Remove it from heat when fully cooked.
04 -
Combine the cooked beef with ricotta, 1 cup of mozzarella, Pecorino Romano, the beaten egg, and some salt and pepper in a bowl.
05 -
Spread 1 cup of the tomato sauce across a baking dish. Fill each shell with the beef mixture and arrange them in the dish.
06 -
Cover the shells with the remaining sauce and sprinkle the rest of the mozzarella on top.
07 -
Bake with foil on for 25 minutes, then remove the foil and bake another 10 minutes until bubbly and golden.
08 -
Finish with a sprinkle of parsley and enjoy while warm.