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
½ teaspoon Kosher salt
½ teaspoon fresh ground black pepper
1 tablespoon cornstarch
1 cup beef broth
8 ounces Provolone cheese slices, chopped (use 6 oz for less cheesy)
6 brioche hamburger buns
Instructions
continued on next page
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