Peel the potatoes, cut them into small cubes and boil them with boiled potatoes.
Heat some butter in a non-stick pan, add the asparagus, sprinkle with herb pepper and sugar and fry briefly. When they begin to take on color, deglaze with a dash of water and simmer until the liquid has evaporated.
Arrange the red lentils on a plate, spread the green asparagus on top and serve with the boiled potatoes.