Directions

1. 1 Heat oven to 400°F. In ungreased 1 1/2-quart casserole, mix onion, gravy mix, pepper, half-and-half and mustard. Gently stir in beef and mushrooms.
2. 2 Place casserole on ungreased large cookie sheet. Place biscuits 1 inch apart on cookie sheet next to casserole.
3. 3 Bake 17 to 23 minutes or until mixture is bubbly and thickened and biscuits are golden brown.
4. 4 To serve, split biscuits in half; place bottom halves on individual serving plates. Top with beef mixture and top halves of biscuits.