4bell peppers halved and seeded (green for classic Philly attitude, red/yellow if you like sweetness)
1lbthinly sliced steak (ribeye is king, but shaved sirloin or deli roast beef works in a pinch)
1largeonion, sliced
1cupmushrooms, sliced (optional)
2tbspWorcestershire sauce
1 1/2cupsmarinara sauce
2tbspbutter or olive oil
salt and pepper
8slicesprovolone or melty cheese of choice
Instructions
Preheat oven at 375°F
In a skillet, sauté onions and mushrooms in butter until caramelized. Add steak, Worcestershire, 1/2 cup marinara, salt, and pepper. Cook just until browned.
Ladle 1 cup marinara sauce on the bottom of a baking dish
Spoon the filling into each pepper half and place them into the baking dish.