Clean, wash and drain the sugar snap peas. Leek onions clean, wash and, up to 4 pieces to garnish, cut into rings. Heat the fat in a pot and fry the spring onions in it.
Pour on 1 litre of water, bring to the boil, add sugar snap peas and frozen peas and season with salt and pepper. Cover and cook for 10-15 minutes. After about 5 minutes, remove some mangetout and peas from the stock and set aside.
Wash the chives, dab dry and cut into fine rolls. Puree the vegetables in the broth and stir half of the crème fraîche into the soup. Season to taste with salt and pepper. Serve the soup in deep cups and place the removed vegetables on the hot soup.
Spread the remaining crème fraîche as a blob and sprinkle with chives. Serve garnished with a young spring onion. Serve with ciabatta bread or baguette.