Cut the endive salad into fine strips and wash. Then put the salad in warm water. This removes the bitter substances from the salad and makes it milder.
In the meantime, peel the onion and cut into fine cubes. Fry the bacon cubes in a pan without adding any fat. For the salad dressing, mix all the other ingredients together and season to taste.
Spin the lettuce dry, mix with the onion cubes and the salad sauce. Finally, pour the bacon cubes over it and enjoy.