Griddle Style Philly Steak Sandwiches

Ingredients (8)

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