How to Make It
Heat oil in a large nonstick skillet over medium-high heat. Add onion, bell pepper, and garlic to pan; sauté 3 minutes. Add mushrooms to pan; sauté 4 minutes. Sprinkle beef with salt and black pepper. Add beef to pan; sauté 3 minutes or until browned, stirring occasionally. Stir in Worcestershire sauce; cook 1 minute.
Place 1 cheese slice half on bottom half of each roll, and top each serving with one-fourth of beef mixture. Top with remaining cheese slice halves and tops of rolls.
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