Cut the bacon into strips and fry them crisply in a pan without fat. Remove from the pan and let it cool down. Cut bread into cubes. Peel garlic and cut into fine slices.
Add butter to the frying fat, add garlic and bread cubes and fry until golden brown. Clean, wash and drain the salad. Pluck into bite-sized pieces. Peel onions and cut into rings.
Arrange on plates together with the salad and croutons. For the vinaigrette, mix oil, vinegar and bacon, season with salt and pepper. Wash parsley, dab dry, pluck leaves from the stalks and chop finely.
Add to the vinaigrette and stir in. Spread over the salad and serve.