01 -
Preheat oven to 190°C. Lightly grease a 23 x 33 cm baking dish with nonstick spray or olive oil.
02 -
In a large skillet over medium heat, cook ground beef and onion until meat is browned and onion softens, approximately 5–7 minutes. Drain excess fat. Add garlic and cook for 1 minute, stirring until fragrant. Stir in marinara sauce and simmer for 5 minutes. Set aside.
03 -
In a medium bowl, combine ricotta cheese, sour cream, softened cream cheese, egg, parsley, salt, and black pepper. Stir until mixture is smooth and well blended.
04 -
Spread a thin layer of meat sauce over the base of the prepared baking dish. Layer half of the ravioli evenly over the sauce. Spoon half of the ricotta mixture over the ravioli, then add half of the remaining meat sauce. Sprinkle with 100 g of mozzarella cheese. Repeat with remaining ravioli, ricotta mixture, remaining meat sauce, and finish with remaining mozzarella and all Parmesan cheese.
05 -
Cover the assembled dish with aluminum foil. Bake in preheated oven for 30 minutes.
06 -
Remove foil and bake an additional 10–15 minutes until cheese is golden and bubbling.
07 -
Allow casserole to rest for 5–10 minutes before serving. Garnish with extra parsley if desired.