As others have mentioned, Bengalis (which I am one) probably have the unique distinction of using Mustard oil as a cooking oil as well as a condiment. In bengali, Shorshe = Mustard Shorsher Tel = Mustard oil Shorshe Baata = Mustard paste A lot of Bengali dishes traditionally are cooked with mustard oil. Although, in recent years, for some reason this tradition is somehow dying. Rising prices of mustard oil combined with negative publicity/perception about health effects of mustard oil may have something to do with this trend. Unfortunate, in my opinion.. I remember when I used to live in Kolkata, we would go to the Ghaani, where you could buy freshly pressed (literally freshly pressed right in front of your eyes) mustard oil. Mustard oil is an acquired taste. So is mustard paste (Shorshe baata ) which bengalis also use as an ingredient in cooking. I always use mustard oil when I am cooking fish stews (Maachher Jhol), bengali style. You deep fry this fish and then prepare the stew with this fried fish. I will sometimes also use mustard oil when doing goat-meat (called "Mutton" by bengalis. Not the same thing as what Brits call "Mutton") stews. Other traditional dishes with mustard paste are "Sorsche Illish" (Hilsa fish with mustard paste), "sorshe potol" (Potol is a kind of veggie, I think its called "parwal" in Hindi). It is very common to eat Jhaal Muri from roadside vendors. Jhaal Muri literrally means hot (as in spicy hot) puffed rice, as is made with puffed rice, mustard oil, onions, green chilli peppers, cucumbers and other condiments... When you deep fry fish (especially "Illish" aka Hilsa), in mustard oil, you can also eat simple freshly prepared rice with just the left over oil and some salt. Yum. Here is simple recipe with pomfret (usually called "pompano" overe here in the US of A), banana leaves and mustard paste and mustard oil. I am writing this from memory as I usually don't measure my ingredients, so please do feel free to experiment with the amounts. Ingredients: 1) Two medium sized pomfret fish, cut into half each. 2) 1/2 cup mustard seeds. You can experiment with the dark brown or the yellow seeds or use a combination. 3) 1.5 cups of water 4) 1/2 tsp sugar 5) 2 tsp salt. Please adjust this 6) 8-16 green chiles, slit lengthwise in half. (please adjust according to your heat tolerance!) 7) 2 tablespoons of good quality mustard oil (sadly, good quality mustard oil is difficult to find in the USA) 8) Banana leaves. If you can't find banana leaves, substitute aluminium foil. Or perhaps you can use some other leaves (squash leaves would be a good substitute). Prepping the banana leaves: The plan is to use the banana leaves as a wrapper, so cut them into about 12inch x 12inch squares. If you warm the leaves up by holding them on top of your stove set to medium heat, they become more pliable and are easier to work with. Preheat oven to 400 degrees Fahrenheit. Add the mustard seeds, half of the water, salt, sugar, mustard oil, into a electric blender/mixer/grinder. Let steep for 5-10 minutes. Then start grinder on highest setting and run for about 5 minutes. If the mixture gets too thick for the grinder, add some water. Continue this process until the mustard seeds are all finely ground and the whole thing appears as a uniform paste, with flakes of mustard seeds. The total time taken may be upto 10-15 minutes. The paste should be little bit more runny than say Dijon mustard. Place the banana leaf squares on the counter. Make a few deep long slashes on the fish so this marinade can go in. Place each piece of fish on this banana leaf square, then pour in some of the mustard paste. Place a few of the green chilli peppers on top. Wrap the banana leaf up in a small square, and you can make a small tight package. Either close the ends with tooth picks or use strips of the same banana leaves to tie them up. Place in middle of oven. Check after 20-30 minutes, depending on size of your fish. Serve with rice. Take the leaf wrappers off before eating! This dish is traditionally made with Illish fish, which is not that readily available in the USA. Also, traditionally, bengalis don't use ovens, so this is often made by placing the banana leaf wrappers on top of a hot skillet. When prepared this way, the leaves will blacken a bit, thereby imparting even more flavor in the fish.