Preheat oven to 350. Spray 9X13 baking dish with cooking spray.
Cook beef and garlic 7 minutes or until beef is cooked through, stirring frequently. Meanwhile, cook pasta according to package directions.
Add salt, pepper, tomato paste, tomatoes, ketchup, pickles (optional) and mustard. Bring to a boil, reduce heat, and simmer 2-4 minutes or until slightly thickened.
Stir in pasta. Add pasta and meat mixture to prepared baking dish. Top with cheese. Bake at 350 for 10 minutes or until cheese is melted.