My ex Austrian Mom in Law always made a simple lentil salad that I love. Cook the lentils following directions on the bag, , , , Rinse with cold water. Red wine vinegar to taste, chopped onion, as much as you like, salt & pepper, and a bit of olive oil if you like. If no on the olive oil, add a bit of water to cut the vinegar a bit. For that matter, use whatever vinegar you like best.