Appetizer Vienna Bread

Directions

1. 1
   Cut 3 lengthwise slits in bread. Cut 1-inch slices crosswise. Do not cut through bottom crust.
2. 2
   Melt margarine. Add onion, poppy seed and dry mustard. Add grated cheese and mushrooms.
3. 3
   Mixture will be gloppy. Spoon into sliced bread.
4. 4
   Use all of mixture. Wrap in heavy foil.
5. 5
   Bake at 350° for 40 minutes on oven rack.
6. 6
   Now cut through bottom crust.