Avocado oil and olive oil mayonnaise

Place the egg and yolk in the blender, add half of the vinegar (lemon juice can also be used) and blend for a few seconds.

Then add the oil (I used soft olive oil) that is falling in a very fine thread with the blender on until it emulsifies, this may take a minute.

Once it is thickened, add the rest of the vinegar and salt to taste, mix everything very well and that's it.