As they say under other circumstances, "it just happened." And it really is very simple.
See here for a French lentil salad. I just made some.
Believe it or not, I had never cooked with French lentils. But they were on sale in bulk at the food co-op, so I got some. I've cooked a lot with the regular U.S. brown/green lentils to make soup, and with orange/pink/yellow lentils to make dal (Indian lentil purée), but never with those dandy little French Lentilles du Puy. (Le Puy is a town in central France.)
Haven't served the dish yet (we eat our supper late here at Acts of Hope) so it is minus the walnuts (which I may or may not use, I tasted the salad and it really is fine on its own), and I didn't have green onions (scallions) in the house so I minced a little piece of a regular onion and it seems to work fine, especially since I had some fresh parsley, so the dish has green. How was that for a run-on sentence?