Mix eggs, milk, 100 ml water, 1 pinch of salt, flour and baking powder to a smooth dough. Let the dough swell for about 15 minutes. Clean and wash the broccoli and divide into small florets. Cook the broccoli in boiling salted water for about 8 minutes, drain and drain.
Heat oil in portions in a small pan (approx. 18 cm Ø). Bake 8 small pancakes from the crêpes batter. Cover each pancake with 1 slice of salmon and fold them together. Put 2 crêpes each with the broccoli into small ovenproof cups.
Mix sour cream, 1 egg yolk, horseradish and honey. Season with salt and pepper. Spread the sauce over the crêpes. Sprinkle with cheese. Bake in a preheated oven (electric: 225 ° C/ gas: level 4) until slightly browned.
Serve garnished with parsley.