Here's a guilt-free way to enjoy the crunchy outside (and juicy inside) of a restaurant-style zucchini stick.   Baked Zucchini Sticks and Sweet Onion Dip Ingredients Dip 1 tablespoon butter 1 medium sweet onion, about 1/2 pound, peeled and sliced 2 tablespoons cider vinegar 2 tablespoons honey 1 tablespoon prepared mustard 1 cup mayonnaise salt