Wash mint, shake dry, remove leaves from the stalks except for something to decorate. Chop finely in the universal chopper. Wash lemon hot, grate dry and finely grate peel.
Mix syrup, 200 ml water, mint and lemon peel. Freeze for at least 8 hours, stirring about once an hour until the ice is firm. Form ice cream into balls, arrange and decorate with mint.