Add vinaigrette slowly to the frisée, about 1 tablespoon at a time, mixing it into the leaves by hand until they are just coated with a light sheen. There should be no pooled vinaigrette at the bottom of the bowl.
Add lardons and toss gently. Distribute the salad into individual bowls. Sprinkle parsley over the salad.
The salad can be eaten as is, although a classic variation, called Salade Lyonnaise, calls for a poached egg (or, as a second choice, a soft-boiled egg) to be set on top of the salad before serving. Add a tiny sprinkle of finishing salt, Maldon or fleur de sel, onto the egg.
Nutrition information per serving:
Calories175Fat16 gSodium350 mgCarbohydrates2 gSaturated fat3 gTotal sugars0 g
Protein6 gCholesterol15 mgDietary fiber2 g