Prepare the ingredients by peeling the onion and chopping it up, trimming the roots and tops of the leeks and finely slicing, peeling the garlic cloves and crushing and chopping the potatoes.
Optional: add 1 tbsp. olive oil to either your soup maker (if it has a sauté function), or a saucepan. Gently sauté the onions for 2 minutes, stirring frequently. Add the leeks and garlic and sauté for a further 2 to 3 minutes, until they start to soften.
Switch off the sauté function/transfer ingredients to your soup maker. Add the potatoes to the soup maker.
Add approximately 800ml to 1 litre of vegetable stock (make sure you stay within the minimum and maximum guidelines on your soup maker).
Stir the ingredients around with a wooden spoon to make sure nothing is stuck to the bottom. Set the soup maker off on the smooth or chunky setting.
Season according to taste.
Optionally garnish with croutons, chopped chives or some crispy bacon bits.
Video
Notes
Sautéeing the ingredients is optional. I have the sauté function built into my soup maker, so it makes this step much easier. If you don't have this function, you can just add all the ingredients to the soup maker if you prefer, skipping step 1. Different soup makers - I made this using a Morphy Richards Soup Maker (1.6L) and the Ninja Soup Maker (1.4L). For different size soup makers, just adjust the amount of ingredients slightly to make sure everything fits in.