INGREDIENTS
1/2 cup
bell peppers
4 servings
butter
1/2 cup
button mushrooms
4 oz
cheddar
1/2 tbsp
cornstarch
1 lb
flank steak
1 tsp
ground pepper
1/2 tsp
kosher salt
1/2 cup
milk
1 tbsp
oil
1/2 cup
onion
8 slices
sourdough bread
1 tbsp
worcestershire sauce