Green bean pastry filling (绿豆馅)

Ingredients:

Dried peeled green bean - 1 bag, 14oz (400g)
Butter - 45g
Oil - 45g
Sugar - 0.5 - 1.25 Cup (your preference. I use 1/2cup)
Sweetened condensed milk - 4 TBSP
Corn starch - 3 TBSP

Steps:

1. Add dried peeled green bean in about 4+ cup water, Boiling until the beans are soft, about 30 minutes. The cooked beans is easy to stick to the bottom. Make sure there is enough water. After cooked, drain excessive water if possible.
2. Beat the cooked green bean with a electrical mixer to make sure it is smooth. Stir in sugar, oil, sweetened condensed milk.

3. In a large fry pan, add butter. When butter is melted, pour in the mixture from 2. Simmer under low heat, gradually sift in corn starch with flour sifter until the mixture can be folded with spatula easily.

4. Take mixture out of fry pan and let it cool down. Chill it in refrigerator. If you do not plan to use it within a day, you can put it in sealed container in freezer.