1/4 cup butter
2 cups sliced onions
1 medium (1 cup) green and/or red bell pepper, cut into strips
1/2 pound sliced deli roast beef, cut into strips
4 hoagie or French rolls, split
8 slices (3/4-ounce each) deli American or Provolone Cheese, cut in half

1. Heat broiler. Melt butter in 10-inch skillet until sizzling; add onions and pepper strips. Cook over medium heat until onion is softened (8 to 10 minutes). Add beef strips; continue cooking until heated through (4 to 6 minutes).
2. Meanwhile, place split rolls onto ungreased baking sheet, cut-side up. Broil 2 to 5 inches from heat until light golden brown (1 to 2 minutes). For each sandwich, place 2 halves cheese on bottom half of bun.
3. Spoon 1/4 hot meat mixture over cheese. Top with 2 halves cheese and top half of bun. Serve immediately.

Makes 4 sandwiches