Philly Cheesesteak Stuffed Peppers

Philly Cheesesteak Stuffed Peppers with all the flavors of your favorite sub sandwich

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Ingredients

1 pound lean ground beef
2 tablespoons butter
1 small yellow onion 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
3 bell peppers split in half and de-seeded through the stem
8 ounces shredded cheddar cheese divided
1 cup beef broth