Wash and peel the asparagus and cut off the woody ends. Put the asparagus on a fat pan of the oven, pour 750-1000 ml of boiling salted water with sugar. Spread 25 g butter in flakes over it. Cover firmly with aluminium foil. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 40 minutes
Peel, wash and halve the potatoes and cook in boiling salted water for about 20 minutes. Peel and finely dice the onion. Heat 2 tablespoons of butter and sauté the onion cubes for about 4 minutes until translucent. Dust with flour, sweat briefly and add stock and 150 g cream while stirring. Bring to the boil, season to taste with salt and pepper. Wash the wild garlic, shake dry, cut into fine strips and add to the sauce
For the hollandaise bag contents, stir into 125 ml cold water with a whisk. Bring to the boil briefly while stirring. Switch off the heat. Cut 50 g butter into pieces and fold in. Stir in 75 g cream. Cut the vanilla pod lengthwise and carefully scrape out the pulp with the back of a knife. Add the vanilla pulp to the hollandaise, use the vanilla pod for other purposes. Arrange asparagus, potatoes, sauce and ham