INGREDIENTS
1 lb
lean ground beef
2 tbsp
butter
1
small yellow onion (diced)
1
small green bell pepper (diced)
8 oz
brown mushrooms (minced)
2 tbsp
ketchup
1
tablespoon Worcestershire sauce
1/2 tsp
Kosher salt
1/2 tsp
fresh ground black pepper
1
tablespoon cornstarch
1
cup beef broth
8
ounces Provolone Cheese Slices (chopped (use 6oz if you don't want it very cheesy))
6
brioche hamburger buns