Cook jumbo shells according to package instructions.
In a medium bowl, combine pierogi, ricotta cheese, mozzarella cheese, half the parmesan cheese, parsley, black pepper, and garlic powder. Mix until ingredients are fully combined.
Stuff each jumbo shell with pierogi filling and place in a lightly greased baking dish.
Pour marinara sauce over shells and sprinkle with remaining parmesan cheese.
Bake for 20 minutes, or until cheese is melted and bubbly.
Interesting Facts
Pierogi are dumplings filled with various fillings, and are a traditional food in many Eastern European countries.
Jumbo shells are large pasta shells, perfect for stuffing.
This dish is a great way to use up leftover pierogi.