Soups are a great way to use up leftover meats and vegetables. They can make a nice first course or a main dish. Almost any soup can be made low in carbohydrate by leaving out the pasta, rice, or grains, and adding non-starchy vegetables. In many of these soups, it's the blended vegetables that thicken the soup, so there's no need for flour or other thickeners. Here are some of my favorite low-carb soup recipes.