Peel and wash the potatoes and cook them in salted water for about 20 minutes. Boil eggs for 8-10 minutes. Peel and wash kohlrabi and carrots. Cut carrots into slices, kohlrabi into slices. Clean, wash and chop the sugar snap peas.
Quench and peel the eggs. Steam carrots and kohlrabi in good 1⁄4 l boiling salt water for about 5 minutes. Add sugar snap peas and cook for about 2 minutes. Drain the vegetables and collect the cooking water.
Heat the fat. Sweat flour in it. Stir in cooking water and milk. Bring to the boil, simmer for 1-2 minutes. Stir in cream. Season sauce with salt, pepper, nutmeg and lemon juice. Wash and chop the herbs and stir into the sauce.
Halve the eggs. Heat in the sauce with the vegetables. Drain the potatoes. Arrange everything. Sprinkle with diced ham.