For the crespelle, mix flour, 1 pinch of salt, milk and egg until smooth. Leave to swell for about 10 minutes. Heat butter in portions in a coated pan (approx. 20 cm Ø) and bake 2 thin golden brown pancakes in it.
Let it cool down. Cover with salmon, roll up firmly and wrap in foil. Cool.
For the soup, peel and finely chop the shallots. Melt the paste in a pot. Sauté shallots in it. Stir in stock and juice, bring to the boil. Simmer for about 10 minutes, stirring occasionally. Add cream and season to taste.
Cut the crespelle into about 10 slices each, put them on the skewers and serve with soup. Garnish with dill.