Wash and peel the asparagus and cut off the woody ends. Cook the asparagus in boiling, lightly salted water covered with 1 teaspoon sugar for about 15 minutes
Clean, wash and slice the mushrooms. Peel and finely chop the onion. Wash the chives and, except for a little bit for garnishing, cut them into small rolls.
Fry the mushrooms and onion in the hot oil. Fry the diced ham briefly. Deglaze with vinegar and 3-4 tablespoons asparagus stock, remove from heat. Season ham and mushroom vinaigrette with salt, pepper and 1 pinch of sugar. Stir in chive rolls
Stir cream balance and starch until smooth. Lift out the asparagus and keep warm for a short time. 1⁄4 l Boil up the asparagus stock. Stir in the starch and bring to the boil again. Season to taste with salt, pepper, lemon juice and zest
Arrange asparagus with ham and mushroom vinaigrette and lemon sauce on a plate. Garnish with lemon wedges and chives. Serve with new potatoes