"Blue cheese provides a simple addition to a hearty grilled steak sandwich that’s ready in 45 minutes - perfect for dinner. MORE + LESS -..."
INGREDIENTS
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4 tablespoons vegetable oil
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2 large onions, thinly sliced (2 cups)
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2 tablespoons balsamic vinegar
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1 teaspoon salt
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1 teaspoon freshly ground pepper
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4 oz blue cheese, crumbled (1 cup)
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1/3 cup mayonnaise or salad dressing
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1 beef flank steak, 3/4 to 1 inch thick (1 lb)
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4 demi French baguette rolls (5 to 6 inches), cut in half horizontally