Add in olive oil and egg to the long jar
Let it sit for 2 full minutes
This will allow them to mix together as the oil and the egg do not have it in their nature to naturally mix together
Next stick in your immersion until it breaks through the egg and run it for a full 30 seconds without lifting it
Then add in the lemon juice, black pepper, mustard and vinegar and blend again for 10 seconds
Lift it for a bit to check the desired thickness and continue to blend for another 30 seconds until you achieved the desired level of thickness
Store in fridge overnight
The mayonnaise should thicken further well
Stays fresh for up to a week