While the dough is resting, prepare the filling:
Pour 2 tablespoons of olive oil or butter in a frying pan and add ground chicken breast. Cook for 2 minutes over medium heat, then add one small finely chopped onion and cook for 2 more minutes, add in the bell peppers and corn. saute for a minute, add a tablespoon of flour and saute, add 1/2 cup of milk, season with salt and pepper and mix until the ingredients are well combined.