INGREDIENTS
1 lb
ground beef
1/2 tsp
pepper
1 tsp
mustard
2 tbsp
ketchup
1 tbsp
worcestershire sauce
1 tsp
soy sauce
1 large
egg
1 pinch
cayenne pepper
1/2 cup
bread crumbs
2 tbsp
butter
12 larges
button mushrooms
1 cup
onion
1 pinch
salt
2 tbsp
flour
2 tbsp
ketchup
1 tbsp
worcestershire sauce
3 cups
beef broth
1 serving
salt
2 tbsp
butter