Recipe information
Total Time
30 min
Yield
Makes 4 main-course servings
Ingredients
3 medium onions, thinly sliced (3 cups)
1/2 stick (1/4 cup) unsalted butter
10 oz mushrooms, thinly sliced (4 cups)
1 1/2 lb sliced rare roast beef, cut into 1-inch pieces (5 cups) and pieces separated
1/4 cup water
4 (6-inch-long) sections soft Italian bread
1/2 lb sliced provolone or mild Cheddar
Preparation
Step 1
Preheat broiler.
Step 2
Cook onions in butter in a 12-inch heavy skillet over moderately high heat, stirring occasionally, until pale golden, about 5 to 7 minutes. Add mushrooms and cook, stirring occasionally, until mushrooms are golden, 5 to 7 minutes. Stir in beef, water, and salt and pepper to taste and cook, stirring, until heated through, about 1 minute.
Step 3
Halve bread horizontally without cutting all the way through and open cut sides, then put bread in a shallow baking pan. Divide beef mixture evenly among bread and top with cheese. Broil 6 inches from heat until cheese is melted, 1 to 2 minutes.
