Preheat oven to 350 degrees F. Spray a 3 quart casserole dish with nonstick cooking spray.
Cook the pasta until al dente, drain, and set aside.
Spray a nonstick skillet with cooking spray. Saute onion and garlic for 2-3 minutes.
Add the ground beef and cook until browned. Drain any excess fat.
Stir in the crushed tomatoes, oregano, Italian seasoning, salt, and pepper. Simmer for 5-10 minutes.
Mix together the pasta, beef-tomato mixture, and cottage cheese.
Pour into the casserole dish and top with the shredded mozzarella cheese.
Bake uncovered 20-25 minutes or until the cheese is melted. Let it rest for 5 minutes before serving.