Ingredients
200g peas
Sprig of mint 
1 tbsp butter
Salt and pepper

Method
Bring the peas to the boil and cook for 3-5 minutes until sweet and just cooked. Keep 5 tbsp of the water. Drain and put peas and all ingredients into a blender and purée until smooth, adding a tbsp of water at a time to slacken.  If you want a very very smooth purée then pass through a fine sieve.  Reheat carefully when you are ready to eat.