Preheat oven to 400°F, prepare pans. Blend the margarine & syrup thoroughly. Beat in the eggs followed by the lemon rind & juice, vanilla & yoghurt. Gently fold in the previously mixed dry ingredients then the chopped cherries, do not overmix. Spoon into pans, top with whole cherries if desired, bake for 20 mins or until cooked. Makes 12. 203 calores per muffin.