Cook noodles and drain. Brown meat in butter and onion. Add salt, pepper, and garlic. Do not drain. Add tomato sauce; simmer 5 minutes. Mix cottage cheese, sour cream, onion, and noodles. Spray square or casserole dish with cooking spray. Layer noodles, then meat, then cheese; repeat. Top with cheese. Bake uncovered at 350º for 25-30 minutes until bubbly.