Can I suggest putting some frozen kale or spinach in it as well? For extra veggies and taste. We basically cook that every week and I love it. Granted, I put a tad more effort into it (stir fry onion and garlic and tomato paste before I add rice, lentils, greens and broth) but it's basically the same.

Also try adding soy sauce, smoked paprika, and liquid smoke. Just a drop but it does wonders. Yeast flakes are also great.