Cover the peas and mint leaves with water and bring to the boil.
Simmer for 5 minutes until the peas are cooked through.
Drain the peas and mint but save the drained liquid in a bowl.
Add the peas and mint to a blender and cover with a little of this drained liquid along with some milk. If the meal is just for baby this can be baby’s usual milk. Otherwise it can be regular milk, cream or crème fraiche.
Blend until smooth. If you prefer you can blend with a handheld blender instead.
Serve while warm.