Ingredients:
– 1 pound lean ground beef
– 2 tablespoons butter
– 1 small yellow onion, diced
– 1 small green bell pepper, diced
– 8 ounces brown mushrooms, minced
– 2 tablespoons ketchup
– 1 tablespoon Worcestershire sauce
– 1/2 teaspoon Kosher salt
– 1/2 teaspoon fresh ground black pepper
– 1 tablespoon cornstarch
– 1 cup beef broth
– 6-8 ounces Provolone Cheese, chopped (adjust to taste)
– 6 brioche hamburger buns
Instructions:
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