Remove the rack from the oven and preheat to 225° F/110° C.
In the Whip 'N Mix Chef, add egg whites and cream of tartar or lemon juice, cover and whip on gear I just until frothy.
Using half of the sugar, add 30 ml/2 tbsp at a time, and beat until stiff peaks.
Switch to gear II and add remaining sugar, 30 ml/2 tbsp at a time, slowly until combined.
Add cornstarch and vanilla extract and slowly mix.
Place the Silicone Baking Sheet with Rim on the cold oven rack.
Using a spoon, scoop out equal portions on the Baking Sheet. Spread each into a circle with
raised sides and a slight well in the center.
Place the rack in the oven and bake for 1h 15 min. Do not open the oven door during baking.
Turn off heat and keep in oven for 45 min.
Top pavlova with whipped cream and fresh fruit or fruit curd. Serve immediately.