Peel the asparagus, cut off the woody ends and cut into pieces about 4 cm long. Clean the sugar snap peas and cut them diagonally in half. Clean and wash the radishes and cut them into slices.
Blanch the asparagus in boiling salted water for about 5 minutes. Add the radishes and mangetouts about 2 minutes before the end of the cooking time. Drain, collecting 200 ml vegetable stock. Rinse vegetables under cold running water and drain.
Heat the fat in a saucepan. Dust with flour and sauté briefly. Deglaze with the vegetable stock and milk, bring to the boil and simmer for 6-8 minutes. 2-3 minutes before the end of the cooking time, add asparagus, mangetouts and radishes.
Season with salt, pepper, sugar and lemon juice.
In the meantime, shape the ground pork into about 20 small balls with moistened hands. Heat the oil in a pan. Fry the meatballs for 3-4 minutes, turning them over and taking them out. Clean and wash spring onions and cut into small rolls.
Wash the chervil, shake dry and pluck the leaves. Fill asparagus ragout into deep plates. Place about 5 meatballs on each plate and sprinkle with spring onions and chervil.