Just use any soup recipe, nothing special about soup maker soup.
I totally fail to see the point in soup-makers, just heat up the ingredients in a pan and use a stick blender. I work in pro kitchens and we make 50 litres soup a day without a soup-maker, takes just a few minutes of the chefs time. The main time is the time to heat the ingredients and that is the same for a soup-maker.
I just use what I have in the fridge etc, left over cooked meat, onions any other raw chopped veg and some stock cubes, fill the soup maker to the Max level with water, and you have lovely fresh soup every time!.....