Peel and finely dice the onion and garlic. Melt the fat in a pot. Sauté onion and garlic in it. Add peas and flour. Deglaze with broth while stirring and bring to the boil.
Simmer at low heat for about 5 minutes. Take out 2 tablespoons of peas. Puree the soup. Season to taste with salt and pepper. Wash the tomatoes and cut them into slices. Put sprouts on a sieve, rinse briefly and drain.
Wash the chervil, dab dry and put something aside for garnishing. Roughly chop the rest of the chervil. Fill pea soup into small bowls. Add 1 blob of crème fraîche to each bowl. Arrange tomatoes, sprouts, the rest of peas and chopped chervil on top.
Garnish with chervil. Baguette tastes good with it.