Preheat oven to 130degC (do not use fan bake). Line an oven tray with baking paper and draw a 28-30cm circle on it using a dinner plate as a stencil. Draw another 8-10cm circle in the centre of the 30cm circle using a ramekin.
Place egg whites in a large, clean, dry bowl (be careful you don’t get any egg shell or yolk in the bowl) and beat with an electric beater on high, until stiff peaks form. Gradually add castor sugar, 1 tablespoon at a time, while continuously beating. Once all sugar has been added, continue beating on high speed for 10 minutes, until sugar has dissolved and meringue mixture is thick and glossy. Beat in corn flour, vinegar and makrut lime powder (if using) for about 1 minute.
Using a large metal spoon, place large dollops of pavlova mixture onto baking paper (in between the two circles), to make a wreath shape. Level the top slightly to create a flatter surface to add the cream later.
Bake for 1 hour and 15 minutes. Without opening the oven door, turn off heat and leave pavlova to cool completely in the oven for 2 hours minimum (or overnight). Don’t worry if pavlova has cracks in it, this is normal (and a good sign of a crispy shell. It will also be covered with cream and curd later).
Once completely cool, you can store the pavlova in a large, dry, airtight container or on a large platter, lightly wrapped in cling film for 1-2 days.
In a bowl, whip cream and vanilla essence until soft peaks form.
To serve, spread vanilla cream over top of pavlova and drizzle with lemon curd. Sprinkle with freeze-dried lychees, makrut lime powder and mint leaves.