One of the exciting things I like about going to markets is discovering new ingredients or unfamiliar varieties of familiar fruits, vegetables, herbs etc. In the past I have found Methi leaves (the herb of the spice fenugreek), kohlrabi (vegetable), and green-skin baingan (eggplant) among other things. Last week, I found purple sweet potatoes. The skin and the flesh are purple!
Most of the sweet potatoes we get are white and orange-flesh, rare is the occasion that you see the cream/yellow-flesh sweet potatoes. And even more rare is the purple-flesh sweet potatoes.