2. preheat the oven at 2 degrees for 1 minutes, then put the egg tart in the middle layer of the oven and bake it at 2 degrees for 1 minutes. Then adjust the upper and lower fire to 18 degrees and continue baking for 1 minutes. Be careful not to open the oven immediately after the time, and let the egg tart continue to bake in the oven for 5 minutes with waste heat.