When preparing to fry food, it is generally recommended to heat the pan before adding the oil. Here's the usual process:
Heat the pan: Place the empty pan on the stove over medium to medium-high heat. Allow it to heat up for a few minutes until it becomes hot. Heating the pan before adding oil helps ensure even heat distribution and promotes better browning and crisping of the food.
Add the oil: Once the pan is heated, you can add the oil. Pour in enough oil to cover the bottom of the pan with a thin, even layer. The amount of oil will vary depending on the recipe and the amount of food you're frying. Allow the oil to heat up for a minute or two, so it becomes hot and ready for frying.
Add the food: After the oil is hot, carefully add the food to the pan. Be cautious when placing the food into the hot oil to avoid any splattering or burns. Make sure the food is arranged in a single layer without overcrowding the pan, as overcrowding can lower the oil temperature and make the food greasy.
By heating the pan first and then adding the oil, you create a suitable environment for frying, allowing the food to cook evenly and develop a crisp outer texture.