Recipes: Hong kong french toast (custard filling)

Preparation:  Preparation time: 30 min Cooking time: 20 min Serving: 4 Ingredients:   Filling ●     2 to 3 salted duck egg yolks ●     1/2 tablespoon (25 g) milk powder ●     2 tablespoons (20 g) cornstarch ●     4 tablespoons (60 g) softened salted butter (if using unsalted, add 1/4 tsp salt)...