Onions peel and chop finely. Wash the herbs, dab dry and chop or cut into fine rolls. Heat the oil in a large pan, fry the buffers in it for about 5 minutes at medium heat while turning them in two portions until crispy. Keep warm. In the meantime cut salmon into fine cubes.
Mix lemon juice, chives, half of the dill, salt, pepper, sugar and onions. Mix in the salmon. Mix the remaining dill and crème fraiche. Serve the buffer, salmon tartar and crème fraîche to taste, garnished with lettuce leaf, lemon slice and dill flakes