INGREDIENTS
1 lb
Ground beef
1 tsp
Montreal steak seasoning
8 oz
Mushrooms
1 cup
White onion
1 cup
Progresso chicken broth
1 tbsp
Dijon mustard
2 tbsp
Steak sauce
2 tbsp
All-purpose flour
8
Burger buns, regular-size
2 tbsp
Butter
1/2 cup
Cheddar cheese, sharp