INGREDIENTS
1 lb
ground beef
1 medium
onion
1
bell pepper
8 ozs
baby bella mushrooms
2 cloves
garlic
1 tsp
salt
1/2 tsp
ground pepper
1 cup
beef broth
2 Tbsps
ketchup
1 Tbsp
worcestershire sauce
1 Tbsp
arrowroot powder
4 slices
provolone cheese
4
brioche hamburger buns