1. Bake the egg tarts in a heated oven at about 150-180 degrees for four to five minutes.

2. Oven preheating means that before baking any food, the oven needs to be preheated to the specified temperature to meet the baking time on the recipe. If it is insufficient, the specified temperature may not be reached. If the oven is preheated and baked for too long, the service life of the oven may also be affected. Therefore, when making egg tarts, it is recommended to preheat the oven for 2-3 minutes.