Preheat the oven to 150C and make sure that the rack is in the middle. We are going to lower the heat later. Line a baking tray with baking paper or use the loose bottom of a cake tin. Line it and place it on the baking tray. Set aside.
Beat the egg whites using a stand mixer with the paddle attachment (medium-high) or use a hand held mixer. Beat till a white cloud of foam - soft peaks, takes about 5 minutes.
Add the sugar. Pour it in in parts so a little at a time, this can be two, three or four parts but don't add it at one time. As you add beat until you've used all the sugar.
Stiff peaks: Once the sugar has been added, increase the speed of the mixer to high and beat for around 2 minutes until the peaks are now snow white and stiff. Turn the whisk upside down, the peaks should be stiff and fall, if they do, keep beating.
Fold in the ingredients Turn the stand/hand mixer off and use the clean spatula (the one you cleaned with vinegar earlier!) to gently fold in the Maizena and the cream of tartare.
Prevent sticking: Dab tiny bits of your egg white mixture onto the pan just to help the baking paper stick to the pan.
Shape the pavlova: Scoop your pavlova out of the bowl - very gently - onto the baking paper and start using the flow of your hand movements to shape it. The back of a spoon helps in getting those side lifts but don't be too pedantic! Its a pavlova not supposed to be perfect!
Oven guideline: (middle rack as mentioned earlier) close the oven and drop the heat to 110 C. DO NOT OPEN THE OVEN AGAIN PLEASE. It will also cool down in the oven.
Bake your pavlova for 1 hour 25 minutes. Don't open the oven but do turn the oven off and leave the door closed. No peeking.