2Heat a large skillet over medium-high heat. Cook and stir ground beef in the hot skillet until browned and crumbly, 8 to 10 minutes. Drain and discard grease. Stir in spaghetti sauce and simmer for 5 minutes.
3Combine cottage cheese, 2 cups of mozzarella cheese, eggs, 1/2 of the grated Parmesan cheese, dried parsley, salt, and pepper in a large bowl.