This is mild vegetarian Indian dish using palak (spinach) and paneer that I have always enjoyed. The flavour varies depending on the type of paneer you use and whether the spinach is in season. I haven't been able to nail it quite as well as a good Indian restaurant does but it makes for a pretty good staple vegetarian meal at home and is great for leftovers.
If the sauce is too thick add water until you reach desired consistency - I like mine thick so I add minimal water during cooking.
You can omit the soured cream or yoghurt and substitute this for water instead (or just use a light variety of the cream or yoghurt)