Recipes: Grilled vegetable skewers

Preparation:  Preparation time: 30 mins Cooking time: 45 mins Serving: 4 Ingredients: 1 summer squash, quartered and cut into 1/2-inch pieces 1 zucchini, quartered and cut into 1/2-inch pieces 1 red onion, cut into thick slices 15-20 cherry tomatoes 15-20 white mushrooms Extra-virgin olive oil Salt and pepper Instructions: Soak...