Hazırlanışı
1Gather all ingredient, and preheat the oven to 350 degrees F (175 degrees C).
2Make sauce: Heat a large skillet over medium-high heat. Cook and stir ground beef in the hot skillet until browned and crumbly, 5 to 7 minutes. Add onion and mushrooms; sauté until onions are transparent. Stir in pasta sauce and cook until heated through. Set aside.
3Make filling: Combine cottage cheese, ricotta, eggs, and Parmesan in a medium bowl and set aside.