Butter - 50g

Onion - 1 chopped

Carrots - 500g sliced

Turnips - 2 diced

Water - 900ml

Vegetable stock - 600ml

Potatoes - 250g sliced

Caster Sugar - pinch

1) Melt 50g of butter in a large saucepan. Add 1 chopped onion and cook until softened (about 5 minutes).

2) Add 500g of sliced carrots and two diced turnips, and stir for 1 minute.

3) Add 900ml of water and 600ml of vegetable stock, then 250g of sliced potatoes and a pinch of caster sugar.

4) Season.

5) Bring to the boil, then simmer for 30 minutes.

6) Blend the soup in a food processor until smooth, pour into a clean saucepan and reheat.