Griddle Style Philly Steak Sandwiches

Details

Ingredients

• 1 (8 ounce) can sliced mushrooms, drained
• 1 small onion, sliced
• 1 green bell pepper, seeded and sliced into strips
• 8 slices provolone cheese
• salt to taste
• seasoned salt to taste
• 1 pound thinly sliced roast beef
• 4 submarine rolls, halved