Preheat the oven to 375°F (190°C).
Cook the pasta shells according to the package instructions until al dente. Drain and set aside.
In a large bowl, combine ricotta cheese, shrimp, scallops, mozzarella cheese, Parmesan cheese, garlic, heavy cream, parsley, salt, and pepper.
Stuff each shell with the seafood mixture and place in a greased baking dish.
Drizzle with olive oil and sprinkle additional cheese on top, if desired.
Bake for 25-30 minutes until heated through and golden on top.
