Cook jumbo shells pasta according to the package instructions until they are al dente. You want the shells to be just slightly under-cooked because they will finish cooking in the oven. Once cooked, strain, and set aside to cool down enough to be handled.
Combine ricotta cheese, egg, herbs, garlic, Parmesan cheese, Mozzarella cheese, and seasoning in a mixing bowl. Mix everything well, until all ingredients are evenly incorporated throughout.
Spread the marina sauce over the bottom of the 9×13 baking dish and spread it evenly.
Fill each shell with about 1.5-2 tablespoons of ricotta filling and place it in the dish.
Sprinkle some Mozzarella cheese and oregano over each shell and bake in a preheated 350 degree oven for about 10-15 minutes or until cheese is melted. Enjoy!
Notes
I don’t like to place shells seam down because the filling often leaks out of the shells, so place shells in the dish seam up.