Plus, what it means when your squash has a bitter taste.Credit: Caitlin Bensel; Food Stylist: Torie CoxFresh summer squash is one of the season’s most versatile vegetables. From casseroles and skillets to fritters and cake (yes, cake), there’s no shortage of recipes to make from a bounty of summer squash.Registered dietitian Chelsea Edwards, owner of Huntsville Nutrition Collective in northern Alabama, says washing summer squash couldn’t be easi…