Sweet Potato Cheesecake Bars

Name: Sweet Potato Cheesecake Bars
Prep time: 15 min
Cook time: 2 h
Total time: 2 h
Yield: 20 pieces
Ingredients: 80 - 90 g sugar; 80 g unsalted butter; 150 g plain flour; 1 medium egg; 20 g cocoa powder, unsweetened; ½ tsp baking powder; 1 - 2 pinch fine sea salt; 600 g water; 300 g sweet potato; 3 egg yolks; 500 g ricotta cheese; 200 g cream cheese; 140 - 100 g sweetened condensed milk; 20 g cornflour; 1 tsp natural vanilla extract; 60 g sweetened condensed milk