This is a delicious cold salad, easy to make, too.   lentils1

2 cups cooked lentils
1 cup diced ripe tomatoes
1/2 cup diced red onion
Mix everything up, season to taste with salt, pepper, thyme
Add 1 cup sour cream and mix well. I like it room temperature and its good when the lentils have just been cooked and are still warm, too. But its meant to be served cold so cover it and refrigerate.