Micro Meat Loaf
["1 (8 oz.) can tomato sauce", "1/4 c. brown sugar", "1/4 c. vinegar", "1 tsp. prepared mustard", "2 lb. ground beef", "1 egg", "1/4 c. crackers", "1 1/2 tsp. salt", "1/4 tsp. pepper"]
["Combine first 4 items in a small bowl; set aside."]
["tomato sauce", "brown sugar", "vinegar", "mustard", "ground beef", "egg", "crackers", "salt", "pepper"]