Ingredients:
2 tbsp butter
1 medium onion chopped
1 1/4 pounds ground beef
8 oz. white button mushrooms sliced
1/3 pound coarsely chopped provolone cheese
1 (10.5 oz.) can of French onion soup
8 oz. penne pasta
2 tbsp Worcestershire sauce
Salt & pepper to taste
1 green pepper chopped
1 tbsp cornstarch