Easy Philly Cheesesteak

Ingredients

• 2 pieces green bell peppers (sliced into strips)
• 1 large yellow onion (cut into half rings)
• 1 lb mushrooms (chopped into bite-sized pieces)
• 2 lb ribeye beef (thinly sliced)
• 1 lb provolone cheese (slices)
• 6 pieces hoagie rolls (toasted or not, your choice)
• 2 tablespoons cooking oil
• 1 tablespoon salt
• 1 teaspoon black pepper (freshly ground)