Peel, core and slice the apples and put in a microwaveable dish with two tablespoons water. Cover and microwave on HIGH for 2 minutes or until the fruit is tender. OR cook in a small pan on the hob, covered for 5 minutes until soft.
Puree the fruit until smooth then cool.
Stir the yogurt into the cold apple, then mix well. Serve straight away or chill until required.