Peel, wash and halve the potatoes and cook in boiling salted water for about 20 minutes. In the meantime, clean and wash the frisée salad, pluck into bite-sized pieces and drain. Cut off the green from the carrots, except for the tender stem base.
Peel the carrots and cut them diagonally into slices. Peel the asparagus and break off the woody ends. Cook the asparagus in boiling salted water for 6-8 minutes. Remove the asparagus and set aside. Cook the carrots in the boiling water for about 2 minutes.
Take out and let drain. Remove 5 tablespoons of asparagus water. Drain the potatoes, let them evaporate briefly and mash them coarsely with a fork. Season vinegar with salt, pepper and sugar and add the asparagus water.
Stir in the oil bit by bit. Mix the potatoes and pink berries with the vinaigrette. Cut asparagus diagonally into pieces of about 3 cm. Mix frisée with asparagus and carrots and arrange on plates.
Drizzle with the vinaigrette. Serve with fresh bread.