Sensational Steak Sandwich

By SEEASTAR

4.61 / 5

30min

4h 20min

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2 tablespoons olive oil
1 pound thinly sliced sirloin steak strips
8 ounces sliced fresh mushrooms
1 green bell pepper seeded and cut into strips
1 medium onion sliced
10 slices provolone cheese
1 loaf French bread
1 (14 ounce) can beef broth
½ teaspoon salt
½ teaspoon ground black pepper
½ teaspoon garlic powder
2 tablespoons Worcestershire sauce
⅛ teaspoon red pepper flakes
¼ cup Pinot Noir or other dry red wine
½ cup prepared horseradish
½ cup brown mustard