Punch up your summer barbeques with Chef Katie's go-to sides: Cantaloupe, Cucumber and Aged Cheddar Cheese with a Cilantro Jalapeno Vinaigrette; Warmed Leeks, Potatoes and Tomatoes with Herbs; and Roasted Beet and Fennel with Orange Vinaigrette. Held in person at the Wallace House, Chef Katie mixes step-by-step demonstration with a dab of hands-on cooking. Gather …