Ingredients

1 cup water1/3 cup soy sauce1-1/2 teaspoons garlic powder1-1/2 teaspoons pepper1 pound beef top round steak, cut into 1/4-inch strips1 medium onion, chopped1 medium green pepper, julienned1 can (4 ounces) mushroom stems and pieces, drained2 cups shredded part-skim mozzarella cheese6 hoagie buns, split and toastedSliced tomatoes

Preparation

In a large resealable plastic bag or shallow glass container, combine water, soy sauce, garlic powder and pepper. Add steak and turn to coat. Seal or cover and refrigerate for 6-8 hours or overnight.

Drain and discard marinade. In a large skillet, brown steak over medium heat. Add the onion, green pepper and mushrooms; stir-fry until tender. Reduce heat. Sprinkle with cheese.

Remove from the heat; stir until cheese is melted and meat is coated. Spoon onto buns; top with tomatoes.