This chutney has an unusual citrusy note which is a perfect complement to grilled shrimp and other seafood dishes. It is also delicious on fresh naan bread. It has a beautiful presentation and would make a wonderful canned gift. Nigella seeds (kalaunji) and fenugreek seeds (methi) can be found at a local Indian grocery store or market. This recipe has been adapted from the Complete Book of Indian Cooking by Suneeta Vaswani.