Let the dough rise in a warm, humid environment (75-80°F) for exactly 1-1.5 hours until doubled in size; this ensures fluffy, pillowy buns that won't be dense or dry after frying.

Cut chicken breast and red bell pepper into small, uniform pieces and cook them together until the chicken is just cooked through, then fold into the cooled heavy cream mixture to prevent sogginess in the filling.

Press and pinch the dough edges tightly around the filling to create an airtight seal; this prevents the filling from leaking during frying and keeps the cheese melted inside rather than escaping into the oil.

Maintain oil at exactly 350°F (175°C) throughout frying; use a thermometer to ensure the outside crisps beautifully in 3-4 minutes while the inside stays soft and the filling stays hot without burning the exterior.

Cool the chicken, pepper, and cream mixture completely to room temperature before filling the dough; hot filling will warm the dough prematurely, making it sticky and difficult to seal properly before frying.