To broil steak, place on broiler pan; broil 4 to 6 inches from heat using times above as a guide, turning steaks once and adding buttered bread slices to pan during last 2 to 4 minutes of broiling time. Turn bread once.
Flank steak is a long, thin piece of boneless meat cut from the lower hindquarters. Flank steak is known to be one of the tougher cuts of meat, and it is usually marinated before it is grilled. Naturally quick-cooking, flank steak is typically used for fajitas and London broil.
Marinate the steak and prepare the sauce the night before. Cover and refrigerate them separately. Just before dinner, grill the steak and assemble the sandwiches.
Serve this hearty open-faced sandwich with a knife and fork so your dinners can savor every last mushroom and bit of sauce.
Enjoy this meaty sandwich with grilled pepper strips and a glass of beer.