Daigaku Imo
Hanamaru Market, a highly successful, long-running Japanese television talk show, opens with a short cooking segment every weekday morning. Finding ways to make impressive classic cuisine simpler and less technically demanding is the theme of many of the episodes. In the autumn of 2008, one of the broadcasts featured an innovative recipe for daigaku imo (candied sweet potatoes) that topped all previous viewer-rating charts. Indeed, as of this writing, nearly a year later, it remains the all-time favorite.
Syrup-glazed, black sesame-studded sweet potato first became a popular snack among university students at the turn of the twentieth century. Indeed, that is the origin of the name of the dish: daigaku means "university" and imo is "potato." Most recipes for daigaku imo instruct the cook to deep-fry sweet potato chunks first and glaze them afterward. Although delicious, the classic version results in a high-calorie snack that is messy both to make and to clean up. In contrast, the Hanamaru Market version offers a (relatively) healthy snack.
Recipe information
Yield
Serves 6 to 8
Ingredients
Preparation
Step 1
Combine the sugar, vegetable oil, water, soy sauce, vinegar, and salt in a skillet just large enough to hold the sweet potato chunks in a single layer. Place over medium-high heat and bring to a simmer. Arrange the sweet potatoes in the pan in a single layer and cover with a circle of parchment paper to keep the surface moist. Lower the heat to maintain a very gentle simmer and cook for 2 minutes. Cover the skillet with a lid (keep the parchment in place) and cook for another 2 to 3 minutes, or until the potatoes are tender. A toothpick inserted into the thickest part of a piece should meet no resistance. If the chunks are not yet tender, add a bit more water and simmer for another minute or two. Check to make sure the sugar doesn't burn.
Step 2
Once the potatoes are tender, remove the lid and parchment and jiggle the skillet to allow the potato chunks to roll around in the rapidly reducing glaze (the vinegar, by the way, will keep the sugar from seizing after the glaze has cooled). After 6 minutes or so, the water and oil in the skillet will have separated and most of the water will have evaporated, enabling you to remove the lightly glazed sweet potato chunks with little or no oil clinging to them.
Step 3
Transfer the glazed chunks to a plate, spreading them out in a single layer. Sprinkle with the black sesame seeds. Let cool to room temperature before serving. They keep at cool room temperature for 6 to 8 hours. If you will be keeping them longer, place them in a covered container and refrigerate for up to 2 days. For optimal texture, bring the potatoes back to room temperature before serving.
