- Put the stock in a large saucepan and bring to the boil.
- Add the shallot or onion, garlic, peas and chopped mint.
- Cook at a brisk simmer for 10 minutes until the peas are tender.
- Transfer in batches to a blender and blend until smooth.
- Season to taste and serve immediately in bowls, topped with a swirl of fat-free natural yogurt, if wished.