1 lb pasta (penne or rigatoni works well) 1 lb beef sirloin, thinly sliced 2 tbsp olive oil 1 large onion, thinly sliced 1 green bell pepper, thinly sliced 1 red bell pepper, thinly sliced 2 cloves garlic, minced 1 cup beef broth 1 cup heavy cream 1 tbsp Worcestershire sauce 1 cup shredded provolone cheese 1 cup shredded mozzarella cheese Salt and pepper, to taste Fresh parsley, chopped, for garnish