Sweet Potato Cheesecake Bars

Name: Sweet Potato Cheesecake Bars
Prep time: 15 min
Cook time: 2 h 40 min
Total time: 2 h 40 min
Yield: 21 piece
Ingredients: 170 g graham cracker; 60 g butter, unsalted; 30 g sugar; 2 tbsp cocoa powder (all types); 595 g water; 300 g sweet potato; 425 g ricotta cheese, fresh; 225 g cream cheese; 230 g condensed milk, sweetened; 1 tsp vanilla extract, natural; 4 egg, large (65-70 g)