→ Main Ingredients
01 -
4 brioche hamburger buns, toasted
02 -
1 tablespoon Worcestershire sauce
03 -
1 cup low-sodium beef broth
04 -
1 small yellow onion, diced
05 -
1 small green bell pepper, diced
06 -
6 ounces provolone cheese, shredded
07 -
1/2 teaspoon kosher salt
08 -
1 tablespoon olive oil
09 -
2 cloves garlic, minced
10 -
8 ounces cremini mushrooms, chopped
11 -
1/4 teaspoon ground black pepper
12 -
1 tablespoon ketchup
13 -
1 tablespoon cornstarch
14 -
1 pound lean ground beef