INGREDIENTS
•
24 ounces baby bella mushrooms
•
1 cup chopped red pepper
•
1 cup chopped onion
•
2 tablespoons butter
•
1 teaspoon salt, divided
•
1/2 teaspoon pepper, divided
•
1 pound beef sirloin, shaved or thinly sliced against the grain
•
4 ounces provolone cheese