This is my adaptation of a recipe I found at http://www.stickyrice.com . You can use this sauce in spicy tuna rolls, or on a volcano or lava roll. jb4 and I looked EVERYWHERE for this recipe and the Sriracha hot sauce is the secret ingredient. You can be authentic and use "real" Japanese mayonnaise (QP, Kewpie), but good old Hellman's works fine too. If you don't want the roe...leave it out, I think it is mainly for color and texture. If you omit the roe this is especially good for making tuna salad.