Mix together Bisquick and milk. Roll dough to 14-inch square. Crumble beef over dough. Mix together butter, ketchup, mustard, onion, and celery. Spread over dough. Roll up jelly-roll fashion and cut into 12 slices. Place cut side up on baking sheet. Bake 15 min. at 425 degrees until golden brown. Mix the soup and milk and heat for gravy. Serve over pinwheels.