1To make the passionfruit sauce, put the passionfruit pulp, water and sugar in a small saucepan. Bring to a boil over medium-high heat. Reduce the heat to medium and simmer, for 5 minutes, until the sauce thickens. Transfer to a bowl and set aside to cool.
2Put the egg yolks, milk, butter and vanilla in a medium bowl and whisk until well combined.
3Combine the flour and sugar in a large bowl and make a well in the centre.
4Whisk the egg mixture into the flour mixture to form a smooth batter.
5Beat the egg whites with a stand mixer until stiff peaks form. Gently fold the egg whites into the batter.
6Select BELGIAN waffle setting and dial up number 6 on temperature control dial.
7Preheat until the orange light flashes and the word HEATING disappears.
8Pour ½ cup of the batter into each waffle square and close the lid to cook.
9Repeat with the remaining batter. Set aside to cool completely.
10To make the lemon cheesecake filling, put the ricotta and lemon curd in a medium bowl and stir to combine.
11Cut each waffle in half diagonally. Spoon some of the lemon cheesecake filling over each half, then sandwich the halves together.