Soft-boil the egg.
Blanch the asparagus for 2 minutes, then transfer to ice water and keep there until serving. This will help the asparagus keep its attractive appearance.
For the hollandaise sauce. In the yolks, add a tablespoon of cold water, a spoonful of lemon juice and mustard. Mix everything with a whisk, place in a water bath. Stirring gradually, bring the sauce to the state of thick sour cream. At the end, you can add a pinch of cayenne pepper.
For spinach. Melt the butter in a frying pan and sauté the onion and garlic for 1 minute. Add spinach, mix everything. Add cream and boil for 3 minutes until thickened. At the end, add nutmeg on the tip of a knife.
For submission. At the bottom of the plate, put the asparagus, preheated in a skillet or on the grill. Top with spinach, eggs and hollandaise sauce. If desired, you can add finely chopped spring greens.