I tried searching on here and I saw where I was told to add a lot of stuff (potatoes, carrots, onions, etc...) but is there something a little more simpler than that?

I have the lentils, some diced tomatoes, and some bouillon (apparently the wrong one. Beef instead of chicken).

What else do I need that isn't going to involve 10 more items? Not trying to be a butt, but I dont like carrots and the other stuff wont be used in any other dish.

Thanks!

UPDATE: Thanks to everyone who replied to me. I appreciate it and will find one that works for me. I had a former friend that made lentil soup for me but I forgot how he made it and the stuff I was seeing, I was like I don't remember him doing all that. Thanks again!!!