Place the pre-cooked corn flour, wheat flour, egg, sugar and salt in a bowl.
Add the water and mix until the flour is moist, kneading it thoroughly until you get a soft and consistent dough (add more water or flour if necessary). Leave the dough to rest for 10 minutes.
Boil the chicken breast in a pan. Shred the boiled meat in a frying pan, adding a little of the boiled water. Add salt, garlic and oregano and cook the meat until the water reduces.
Make a ball with a portion of the dough to place it on clingfilm and spread it out with your hand. Add a tablespoon of the filling in the centre and fold into a half moon shape with the help of the clingfilm. Repeat the process for each unit.
Spray the pasties with olive oil and cook in the fryer.