Place water, oil, salt, and annatto powder in a pot and bring the mixture to a boil.
Stir in the rice flour and the all-purpose flour. Mix well until it forms a rough dough.
Remove from the heat and knead the dough for about 2 minutes. Let it cool completely.
Pour oil into a hot skillet and saute minced onions and garlic for a minute.
Add in the mung beans and green papaya and stir fry for 3 minutes.
Drizzle with soy sauce and mix well.
Season with salt and ground black pepper to taste. Set aside.
To assemble, divide the dough into 4 portions. Wrap each dough in a cling film or saran wrap.
Unwarp the first ball of dough and using a rolling pin roll out the empanada dough to form a large flat circle.
Spoon out 3 tbsp of the mung bean and grated papaya filling and place onto one side of the dough.
Create a well at the center of the filling.
Crack an egg and place it at the center of the savory filling. Add a tablespoon of Vigan Longganisa.
Fold the flattened dough to form a half-moon and press the edges to seal. Cut the excess dough to have a uniform shape and size.
Repeat the process with the remaining dough.
Fry the empanada in vegetable cooking oil until crispy. Drain excess oil of each cooked empanada on paper towels.
Serve hot with spiced Sukang Iloco dipping sauce.