INGREDIENTS
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1 lb. lean ground beef
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2 Tbsp. butter
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1 small yellow onion, diced
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8oz. brown mushrooms, minced
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2 Tbsp. ketchup
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1 Tbsp. Worcestershire sauce
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1/2 tsp. salt
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1/2 tsp ground black pepper
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3 green bell peppers
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8oz. shredded cheddar cheese, divided
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1 cup beef broth