Filling Ingredients:
225g dried Yellow Mungo Beans (canned red or black beans can be substituted)
1/2 cup White Sugar (add more for more sweetness)
First Dough Ingredients:
1 cup all-purpose Flour
1/3 cup Vegetable Oil
Second Dough Ingredients:
2 cups all-purpose Flour
3 Tbsp. White Sugar
1/2 cup Vegetable Oil
1/2 cup Water
Glaze:
1 Egg, beaten
Hopiang Mungo
Filling Preparation
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Soak beans in water overnight.
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The next day, drain water, cover beans with fresh water and bring to a boil.
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When the beans start to soften, reduce the heat and scoop out most of the water above the beans with a spoon.
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Add sugar and continue cooking beans over low heat.
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Keep stirring to prevent burning, until the beans have softened to a paste.
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Remove them from the heat and let them cool down.
First Dough Preparation
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Mix flour and oil together and Set aside.
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Second Dough Preparation
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Combine flour and sugar.
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Combine oil and water in a separate bowl.
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Now pour in the dry ingredients and knead well, until dough is smooth and changes from a white color to an ivory color.
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Divide the dough into half.
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Roll out one portion into a square, about 30cm (12 inches). Do not flour your work surface; the oil in the dough will keep it from sticking. Dough should be very thin, less than 0,3 cm (1/8 inch), and very even. This thinness is more important that the exact shape or size of the rolled-out dough.
Putting toghether
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Crumble half of the first dough, spreading it evenly over the rolled out second dough.
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Roll up tightly, like a jellyroll, into a cylinder. Roll cylinder back and forth under your palms, stretching it to 40cm (16-inch) in length, about 2,5cm (1 inch) in diameter.
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Cut in half and wrap in clean towel
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Let it chill in the refrigerator for about 10 minutes, to absorb excess oil (do not refrigerate overnight; dough will harden).
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Repeat process with the remaining halves of the two doughs.
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Preheat oven to 190°C (375 °F).
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Remove one chilled cylinder of the dough from the refrigerator. Roll back and forth under your palms, stretching cylinder to 30cm (12-inch) in length, about 2cm (3/4 inches) in diameter.
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Cut in half. Cut each half into 6 pieces (or 8 for smaller pastries).
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Roll each piece into a rectangle. Dough should be very thin (may use a plastic tumbler instead of a rolling pin).
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Place a heaping tablespoon of the mungo filling at the center.
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Gather edges of dough over the filling and pinch them together.
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Place pinched side down, pat into a circle and flatten slightly.
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Repeat this procedure for all the dough in the refrigerator.
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Place hopia on an ungreased cookie sheet or on a sheet of foil.
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Bake 15 to 20 minutes, until bottoms are brown (tops of hopia will still be pale).
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Remove from oven and brush each hopia with beaten egg.
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Set oven to broil and return hopia to oven until nicely brown for about 2 minutes.
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Watch carefully to prevent burning.