Step 1

Preheat the oven to 400 degrees F (200 degrees C). Place bell peppers cut-side up on a baking sheet.

Step 2

Heat a 12-inch skillet over medium heat. Cook and stir steak until lightly browned, about 10 minutes. Remove from skillet.

Step 3

Add onion, mushrooms, olive oil, garlic, and steak seasoning to the skillet. Cook and stir until onions and mushrooms are nice and tender, about 5 minutes. Return the steak to the skillet and cook for 3 to 5 minutes more.

Step 4

Spoon steak mixture into the bell pepper halves until full. Top with provolone cheese.

Step 5

Bake in the preheated oven until cheese on top is golden brown, about 15 minutes. Let cool.