Chop the apples and put in a bowl and sprinkle with lemon juice. Add the celery, cheese and grapes and mix together. Arrange a little shredded lettuce in the base of four dishes. Pile the cheese and fruit mixture on top.

Mix the orange rind, juice and yogurt together, then pour a little over each cocktail. Serve chilled.

Always wash fresh fruit thoroughly in cold water. This is particularly necessary when using unpeeled fruit such as apples and grapes. A crisp variety of dessert apple will give a pleasant contrasting texture to the cheese.