Step 1

Preheat the oven to 400 degrees. Place the peppers cut side up in a baking dish and season with salt and pepper.

Step 2

Bake for 20 minutes.

Step 3

While the peppers are baking, prepare the cheesesteak filling. Heat the olive oil in a large pan over medium high heat.

Step 4

Add the onions to the pan and cook for 4-5 minutes or until onions have softened. Add the mushrooms and cook for an additional 4-5 minutes until vegetables are browned and tender. Season with salt and pepper to taste.

Step 5

Season the steak with salt and pepper to taste. Add the steak to the pan and cook for 3 minutes or until just done.

Step 6

Place one slice of cheese inside each pepper half, then fill each pepper with the cheesesteak mixture.

Step 7

Add another slice of cheese on top of each pepper.

Step 8

Broil the peppers for 3 minutes or until cheese is golden brown and melted.

Step 9

Sprinkle with parsley and serve.