Poppy seeds, like sesame seeds, add a wonderful nutty taste to foods. Bengalis grind them and use them in quantity with vegetables like potatoes and cauliflower to provide a thick clinging sauce. The result is unusual and quite superb. This potato dish may be served with most Indian meals. It could also be served with roast lamb, lamb chops or with grilled (broiled) or roasted chicken. Note: Cauliflower may be cooked in exactly the same way. Break it into flowerets first. I bought white poppy seeds at the Chinese grocery store.