Ingredients
Method
1.Melt the butter in a pan. Add the potatoes and stir well. Cover and cook for 5 minutes. Stir in the spring onions. Add stock and bring to the boil. Cover and cook for 10 minutes.
2.Add peas and cook for 3 minutes. Then puree the soup, pour into a bowl and whisk in the yoghurt. Season with salt and pepper.
3.Cool, then cover and chill overnight.
4.Just before serving, squeeze in the lemon juice and add a little water if you want a thinner consistency.
