Mix flour, egg, milk and 1 pinch of salt to a smooth dough, put aside. ##Wash, quarter, seed and dice the tomatoes. Peel and finely dice the shallot.
Whisk lemon juice, ketchup, salt, pepper and 1 pinch of sugar. Pour in a thin stream of oil and fold into the mixture. Mix in tomatoes and ##shallots##. Wash the chervil, dab dry and remove the leaves.
Set some leaves aside for garnishing. Wash and peel the asparagus and cut off the woody ends. Boil plenty of water with 1 teaspoon of salt and 1 teaspoon of sugar. Cook the asparagus for 12-15 minutes. In the meantime, spread a flat, coated pan (approx. 18 cm Ø) with a little clarified butter.
Bake 4 thin crêpes one after the other. Spread the asparagus spears evenly over the crêpes. Whip the crêpes around the asparagus spears. Spread tomato salsa on top. Add the ham. Garnish with the rest of the chervil.