Vegan, soy-free, gluten-free, low fat and healthy. Great to prepare ahead and freeze. I like to add some fresh herbs before eating like parsley, coriander or chives.
Recipe is in German, but I think it is quite understandable.
The basis is a vegetarian broth made of onions, garlic and as much vegetable as you can find - I put my leftovers and cut offs always in one of the drawers in the freezer and make a big pot when it is overflowing.
Then you just have to add a part of potatoes and red lentils, cook for about 15-20 minutes and then blend everything. Add salt, horseradish and other spices and enjoy.