2lbsJapanese sweet potatoes (satsumaimo), peeled and sliced into ½-inch rounds
3/4cupwhite sugar, or to taste
1/3tspsalt
1tbspmirin (sweet sake)
1jar/cansweetened chestnuts in heavy syrup (use at least 6, cut in half or left whole if small)
2tbspheavy syrup from the chestnuts, or replace with 1 tablespoon honey and 1 tablespoon water
Garnish: optional
Whole sweetened chestnuts, drained of heavy syrup
Instructions
Soak the sliced sweet potatoes in water for at least 30 minutes, changing the water once or twice. Drain. This will release excess starch.
Boil the sweet potatoes in a medium-sized saucepan, uncovered, for approximately 15 minutes or until tender. Check for doneness. Can you easily pierce it with a bamboo skewer? Drain. Mash the sweet potato, using either a pestle and mortar or a potato masher. For a very smooth texture, you can also use a food processor or a wooden spatula and fine meshed strainer to mash the sweet potatoes.
Return the mashed sweet potato to a clean saucepan, and add in the sugar, salt, mirin, and syrup. Bring the mixture to a boil, stirring and mashing and stirring continually with a wide wooden spoon or long-handled paddle – be careful, as the mixture gets very hot. When it starts to thicken, add in the drained chestnuts. Cook on medium-high heat for approximately 5 minutes, stirring, to combine the mixture thoroughly; it should be thick enough to adhere to the wooden spoon and not fall off, so cook longer if necessary.
Serve at room temperature, either in a large bowl or in small individual servings during your Osechi feast. If you have any left-over chestnuts, place a few whole on top as garnish.
Notes
This makes a lot of Kuri Kinton! So, if you are expecting a smaller crowd, cut the recipe in half.