BBQ Beef and Biscuit Casserole

16 oz. can (8 ct) flaky biscuits
1 lb. ground chuck
1 yellow onion, chopped
1 c. BBQ sauce
14 oz. can diced tomatoes, drained
1 1/2 c. shredded colby jack cheese

Preheat oven to 350 degrees. Spray 9x13 dish. Place biscuits in bottom and flatten so that they cover the entire dish. Bake until slightly browned, about 10 minutes. Cook meat and onion in skillet over medium high heat. Rinse and drain grease. Add BBQ sauce and tomatoes. Stir to combine. Pour mixture over biscuits and top with cheese. Bake additional 10-15 minutes until cheese is melted and mixture is bubbly.