To cook grits, bring water & salt to a boil. Add grits and stir, reducing heat to simmer. Add half and half. Continue to simmer, stirring occasionally. If grits become too thick, add more water or half and half. Chop peppers and onion and set aside. Slice Italian sausage and cook in a large frying pan. Add garlic, peppers and onion to drippings in frying pan. Add shrimp and cook until pink. Sprinkle flour on vegetables and shrimp and stir. Add chicken or beef broth and stir until thickened. Water may be added if this becomes too thick. Add worcestershire sauce and season with Cajun and Italian seasonings.