Lemon wash in hot water, cut into half, removing the seeds, and place on a plate in a single layer. A little sprinkle of sugar on each slice.

Grate cheese on a grater (cheese, any: fused or solid which one You like best). On each slice spread a little cheese and pour mayonnaise.

Walnuts grind (better to slice it with a knife so the pieces were not too small, but can be crushed in a mortar) and sprinkle them on our appetizers. If no walnuts, you can replace any other, and even sunflower seeds.