Since this is a mayonnaise for beginners, you may use the immersion hand blender, so you won't have to whisk it by hand. •Put all the ingredients at the same time in the container•Start to whip them turning the mixer on and off with a certain pace. Wait a second and stay put every time you give it a whisk. This is a method to not make it curdle.•Once the mixture is already white and dense, start pouring the oil very slowly [these are at least 100ml in addition to the 200ml of oil you had to use at the beginning]. Keep whisking, don't ever stop white you do that. You can also ask someone to help you by pouring the oil while you keep whisking at the same pace. If done well, the entire process takes 5 minutes.It should be creamy and white. NOTE: the mustard is really important because it helps you not curdle your mayonnaise.