To prepare a summer squash and corn chowder soups recipe, you'll first need to prepare your ingredients. Squash is one of the most versatile vegetables, and can be used in many different ways. You can use it in soup, salads, or even as an ingredient in savory dishes. If you don't want to cook it, just peel it and cut it into bite-sized pieces. Peel the skin off the squash, then cut the flesh into chunks. Add the chopped onion, carrot, celery, thyme, salt and pepper to taste. Cook the ingredients over medium heat, stirring occasionally, until the vegetables are tender, but not mushy.