No-Fail Orange Curd Recipe aka Homemade Orange Curd

Egg Yolks - 3 large

Whole Egg - 1 large

Corn Starch -

Orange zest -

Lemon zest -

Orange Juice - 3/4 cup  (90 ml) 

Lemon Juice - 4 tbsp 

Sugar - 100 grams  (1/2 cup)

Cold unsalted Butter cubed - 113 grams - 1/2 stick