Philly Cheesesteak Sloppy Joes

Ingredients (13)

• 1 pound ground beef
• 1 small yellow onion, diced
• 1 small green pepper, diced
• 8 ounces cremini mushrooms, diced
• 2 tablespoons ketchup
• 1 tablespoons Worcestershire sauce
• 2 to 4 tablespoons A1 sauce, depending on how strong you want the flavor
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1 tablespoon cornstarch
• 1 cup beef broth
• 8 ounces provolone cheese, sliced
• 6 sesame seed bakery hamburger buns