heat because this allows their natural sweetness to develop and creates a softer, more flavorful filling without burning them.
Add water gradually while cooking the onions to help them soften evenly and prevent them from sticking to the bottom of the pan.
Allow the onion mixture to cool completely before adding the tuna because warm filling can soften the puff pastry and affect its crisp texture during baking.
Drain the tuna thoroughly before mixing it with the filling to prevent excess moisture from making the pastry base soggy.
Soak the
Flavorful One-Dish Tuna and Onion Puff Pastry Pie Meal
