Philly Cheesesteak Stuffed Peppers

• 6 medium green bell peppers - tops, seeds, and membranes removed
• 2 tablespoons olive oil
• 2 tablespoons butter
• 1 (8 ounce) package sliced fresh mushrooms
• 1 large onion, sliced
• 6 sandwich steaks, sliced into strips
• salt and ground black pepper to taste
• garlic powder
• 12 slices provolone cheese

1. Preheat the oven to 400 degrees F (200 degrees C). Stand peppers up in a single layer in a 9x13-inch baking pan.
2. Bake in the preheated oven until just soft, 10 to 15 minutes.
3. Meanwhile, heat oil and butter in a skillet over medium heat. Add mushrooms and onion; cook and stir until browned, 5 to 7 minutes. Add steak strips and season with salt, pepper, and garlic powder to taste. Cook until heated through, 5 to 7 minutes more.
4. Remove peppers from the oven, leaving oven on. Drain any liquid that may have accumulated in the bottoms. Fill each pepper with steak mixture and top with a slice of provolone cheese.
5. Return peppers to the hot oven and bake until provolone cheese is brown and bubbly, 10 to 15 minutes more.

green bell peppers, olive oil, butter, mushrooms, onion, sandwich, salt, garlic, provolone cheese

Taken from www.allrecipes.com/recipe/269256/philly-cheesesteak-stuffed-peppers/ (may not work)