Melt the fat in a pot (approx. 2 litres capacity). Stir in flour and sweat for 3 minutes while stirring. Remove the pot from the stove and let it cool down. Wash the meat, dab dry and cut into cubes.
Wash the asparagus, peel and cut off the woody ends. Cut the asparagus spears into slices. Peel, wash and slice the carrots. Put meat, carrots, asparagus and peas in 1 litre of boiling salted water and simmer for about 5 minutes.
Drain broth, collect. Keep vegetables and meat warm. Pour stock into the roux while stirring, bring to the boil and simmer for 5 minutes. Refine with cream, season to taste with salt, pepper, sugar and lemon juice.
Arrange in soup bowls, add vegetables and meat. Garnish with pink berries and chives. Roasted baguette tastes good with it.