1. Prepare toast, an egg
2. Separate the egg white and egg yolk, add sugar and a small amount of white vinegar to the egg white; salt, add a little salt to highlight the sweetness;
3. .The egg whites are beaten with a whisk at high speed until hard foaming
4. Use a spatula to spread the meringue on the toast, without smoothing, leave a small pit in the middle, put the egg yolk in the middle, use one egg, only one yolk;
5. .Put it into the preheated air fryer and fry at 170°C for about 10 minutes;
6. The meringue is baked until it is colored and ready to be out; a bite, like marshmallow;
Tips:The temperature should not be too high, please pay attention to it at any time, just paint
