For the pancakes, mix flour, milk, 100 ml water, eggs and 1 pinch of salt until smooth. Let the dough swell for about 30 minutes.
Mix yoghurt and salad cream for the dip. Season to taste with salt, pepper and lemon juice.
Wash and peel the asparagus and cut off the woody ends generously. Cook in a little salted water covered with 1 pinch of sugar for 12-15 minutes, depending on the thickness of the stalks.
Heat the oil in portions in a coated pan (approx. 24 cm Ø) and bake 4 pancakes in total. Cover each pancake with 1 slice of ham and 2 asparagus spears and roll them up. Let them cool down if necessary and cut them into slices. Serve hot or cold with the dip.