Preheat oven to 350F and collect the ingredients for the cheesesteak stuffed peppers recipe
Place 6 halves of bell peppers on baking pan and bake in the oven for 10 minutes
In a large sauteed pan over medium-high heat, add vegetable oil followed by white onion. Cook onion for a minute.
Add mushroom. Cook for another minute
Add striploin, stir occasionally and season with salt and pepper, adjust the taste if necessary
Cook for 3-5 minutes (depending on how well done you want your steaks to be)
When the peppers are done baking, take them out of the oven and put 1 slice of provolone on the bottom of each pepper
Add the steak mixture to the peppers
Top peppers with the rest of the provolone slices
Bake cheesesteak stuffed peppers for 5-10 minutes or until the cheese is completely melted.
Serve immediately and garnish with chopped parsley