Mor kootu is a side dish popular in Tamil Nadu where vegetables are cooked in a coconut yogurt gravy. It tastes very similar to kichadi / pachadi of Kerala cuisine. Here beet greens are used for the curry. If you use just beet leaves and not the stem, the dish will look more to the greener side. The more the stem you add, the more the pink the dish will be.
Recipe Courtesy: Madhuram's Eggless Cooking