Wash the lemon, pat dry and finely grate the peel. Rinse off the mint, pat dry, pluck off the leaves. Mix the mint, rock sugar and lemon peel well in a blender.
Wash and clean the strawberries and cut in half or into quarters depending on the size. Finely mix 150 g strawberries with the liqueur, mix with the remaining strawberries. Arrange on plates.
Whip the cream until half stiff and distribute it on the strawberry mix. Serve sprinkled with mint sugar.