Sweet Potatoes Roll/ 고구마빵/蕃薯卷

Sweet Potatoes are large,starchy, sweet-tasting. Besides simple starches, sweet potatoes are rich in complex carbohydrates, dietary fiber, beta carotene ( a vitamin A equivalent nutrient), vitamin C and vitamin B6.

The flesh range from beige through white, red, pink, violet, yellow, orange and purple. Sweet potatoes varieties with white or pale yellow flesh are less sweet and moist than those with red, pink or orange flesh.

Pink, yellow and green varieties are high in carotene, the precursor of vitamin A. Sweet potatoes varieties with dark orange flesh have more carotene than those with light-colour flesh.


In certain parts of the world, sweet potatoes are locally known as camote, kamote, goguma, man thet, ubi jalar, ubi keladi, shakarkand, satsuma imo, batata or el boniato.^[5] In New Zealand English, the Māori term kūmara is commonly used.

番薯（学名：Ipomoea batatas），又名蕃薯、红薯、甘薯、山芋、番芋、地瓜、红苕、线苕、白薯、金薯、甜薯、朱薯、枕薯等。常见的多年生双子叶植物，草本，其蔓细长，茎匍匐地面。块根，无氧呼吸产生乳酸，皮色发白或发红，肉大多为黄白色，但也有紫色，除供食用外，还可以製糖和釀酒、製酒精


 中医学  认为甘薯補虛乏、益氣力、健脾胃、強腎陰^[。
當前，番薯在世界各地都有广泛栽种。1995年美國生物學家發現，甘藷中含有一種化學物質叫脫氫表雄酮（DHEA），可以用於預防心血管疾病、糖尿病、結腸癌和乳腺癌

（以上质料摘自百科全书）




 Ingredients:
(A) bread  flour 450g
      yeast 2 tsp
      salt 1 tsp
      sugar 50g

(B)  water or milk  200ml
       egg, 1  

(C)   butter  30g ( for me I use grape seeds oil )

Filling:
sweet potatoes  600g ( cut it into small cube form)
sugar 6 Tsp
water  6 Tsp
( Boil the sweet potatoes together with the sugar and water with medium heat. Reduce the heat to a low simmer and braise by occasionally spooning the sauce over the sweet potatoes ,continue cooking until the sweet potatoes have absorbed the sauce and are flavorful) ,remove from heat and set aside.


Method:
1. Mix all the ingredients for filling, except butter. Set aside.

2. Mix (A) till well blended.

3. Add (B) and knead to form a dough.

4. Add (C), continue to knead to form a smooth and elastic dough.

5. Cover the dough with a damp cloth. Let it prove for 50  to 60 min or till it doubles in size.

6. Punch out the air.

7. Divide the dough into 2 potions and let it rest for 15 min.

8. Flatten and roll out the dough into a long rectangle respectively, about 21cm x 32cm.

9. Brush the melted butter over the dough, leaving about 0.75cm around the edges clear.

10. Divide "the filling" into 2 potions. Sprinkle " the filling" on the surface of the dough, leaving about 0.75cm around the edges clear . Roll it up respectively and trim the edges.

11. Cut the rolled dough, about 4cm each. Place the dough on the baking cup and rest for another 30 min.

12. Preheat the oven for 5 min.

13. Bake for 15-20 min at 180 degree C or till it turns golden brown colour.

14. Remove from the oven.