Step 1

Place a slice of provolone into each bell pepper halve. Preheat the oven to 400°F.

Step 2

Heat a large 10.5″ cast iron skillet over medium high heat. Once hot add the butter, then the steak. Brown the steak for 3-4 minutes then add in sliced peppers and onions.

Step 3

Cook for about 5 minutes until the peppers and onions are soft. Season to taste then divide the mixture between the 4 bell pepper halves. Top with mozzarella cheese.

Step 4

Transfer the skillet to the oven and bake for 15 minutes. Serve immediately.