I made a version of this lentil beet soup in Argentina. If I can remember, I think I added an extra beet or two, I used different colored lentils.. leftover style, and I topped it with fresh basil instead of cilantro. Both are on the sweeter side of herbs.. and as long as the herbs are fresh - the soup works :)
La Glorieta, pictured second, is a place I loved to dance. In the middle of the park, open on all sides, beautiful weather.. ah.. I miss it.