Add all ingredients to the soup maker, including the stock pot/cube.
Add hot water up to the MAX line.
Place the lid on and set off on smooth.
If at the end of the soup maker cycle the soup is too thick, pour in some hot water and stir/blend it in. Continue until the soup is at your preferred consistency.
Notes
*split red lentils: 150g split red lentils in a Ninja Soup Maker (1.4L capacity) produces a fairly thick soup. I add this amount and then add a little hot water at the end of the soup maker cycle to make a it a little thinner. If you prefer a thinner soup, reduce the amount of split red lentils to 100g - 125g.