I make soups in my crock pot all the time. I start with a bit of oil on the bottom; add mirepoix (chopped onion, celery & peppers) to sauté for a bit; then add other veggies as desired to soften a bit (cabbage, potatoes, whatever one likes in soup); after they are at the desired consistency, add liquid (water or broth if you use it, even a small bit of coffee for flavor). I add spices as I go along: salt, pepper, thyme, etc. using whatever matches the ingredients or 'to taste'. Sometimes I add dried beans or rice; sometimes I add diced tomatoes or tomato puree depending on the desired soup. If you eat meat, which I don't, you can add meat to the soup as it is cooking; you can sauté meat at the start if desired before adding the additional vegetables. For a chowder, add a bottle of clam juice as well as some diced potatoes and some frozen corn. If you like a fishy soup, add a bit of water drained from a tuna can if you ever make tuna sandwiches. If anyone in your family is vegetarian you can do what I do and keep meat out of the soup until after it is served in the bowl, then add a bit of meat broth and actual meat to the bowl for the meat eaters. Sometimes I add a dollop of gravy for flavor as well. For a minestrone or other noodle containing soup, add a small handful of dry noodles toward the end so they don't get too soft. Keep the crock on high at first and turn it down to low before you leave (if you leave). When you get back home (or about 30-60 minutes before eating, give it a stir and turn it back up to high again. Add additional spices to taste; add some freshly chopped onions or other condiments as desired when serving.