Roasted sweet potato is a popular winter street food in East Asia. In China , yellow-fleshed sweet potatoes are roasted in a large iron drum and sold as street food during winter. Although any type of goguma sweet potato can be roasted, softer, moist varieties such as hobak-goguma pumpkin sweet potato are preferred over firmer, floury varieties such as bam-goguma "chestnut sweet potato" for roasting. Roasting goguma in the drum can.
Ipomoea batatas (L.) Lam.
How to make and buy yams | WW USA
The sweet potato Ipomoea batatas is a dicotyledonous plant that belongs to the bindweed or morning glory family , Convolvulaceae. Its large, starchy , sweet-tasting, tuberous roots are a root vegetable. The sweet potato is only distantly related to the potato Solanum tuberosum and does not belong to the nightshade family, Solanaceae , but both families belong to the same taxonomic order, the Solanales. The sweet potato, especially the orange variety, is often called a "yam" in parts of North America, but is botanically very distinct from true yams. The plant is a herbaceous perennial vine , bearing alternate heart-shaped or palmately lobed leaves and medium-sized sympetalous flowers. The edible tuberous root is long and tapered, with a smooth skin whose color ranges between yellow, orange, red, brown, purple, and beige.
In season: Japanese sweet potatoes
Digging into a baked sweet potato makes me sigh with contentment. Extras like butter, salt and pepper are fine. But truly, I prefer sweet potatoes baked absolutely plain. They are best stored only for short periods in a cool, dry place in an open basket or other well-ventilated holder.