Lentils are great for making simple soups more substantial. Carrot and lentil is a classic soup combination.
Heat the butter in a large saucepan.
Add the onions and sauté until soft.
Add the garlic and stir for a minute.
Add the tomato puree, carrots, lentils, honey and salt then the stock and stir.
Bring to the boil then leave to simmer for 35minutes until the lentils are soft.
Leave to cool then blend in a food processor until smooth.
Heat up again before placing in a food flask for lunchboxes.