Aah, lentil soup. Perhaps the ultimate comfort food?
I always soak my lentils first, to ease digestion and to speed up cooking time. I like to soak mine a day before I make the soup, but they can be soaked 8 hours before the recipe is made. To soak, add the lentils to a bowl and cover with water and 1/2 teaspoon of baking soda.
Put the first three ingredients in a pot, bring to the boil and simmer for 20 mins with the lid on. Empty the water, then add the rest of the ingredients, bring to the boil and simmer for 15 mins with the lid on.