I recommend Matouk's brand, coming to us from Trinidad, and available all over Crown Heights and other Caribbean areas of New York.
Shown: Matouk's Hot Chow, 9 oz. $3.99 for the 13.4 fl. oz. jar at the produce market on Nostrand and Eastern Parkway in Crown Heights. Available in Crown Heights, Bed-Stuy, and other Caribbean businesses and hoods in NY. I bet they have it at the West Indian Market on Broadway and Winona in Andersonville, Chicago. And John R Wong in Kingston must have it.
Ingredients: Water, distilled vinegar, papaya, carrots, onions, mangoes, sugar, coraillie, mustard, modified corn starch, salt, hot peppers, spices, colour FD&C yellow #5. Anyone know what coraillie is? Bitter melon?
Tastes like: Chunky tropical mustard. Use it on that turkey sandwich, you'll love it.
Notes: Caroline, you're gonna love this. Go get some and let me know!