INGREDIENTS
3/4 lb
lean flank steak, sliced thin
1 tsp
Worcestershire sauce
1/2 tsp
garlic powder
1/2 tsp
onion powder
Salt and pepper
1 tbsp
olive oil, divided
1
small sweet onion, sliced
1 cup
mushrooms, sliced
4
peppers, seeded with tops cut off
4
slices light Swiss cheese