Step 2
Make the custard base: In a heavy-based saucepan, combine the gelatin, brown sugar, salt, nutmeg, ginger, cinnamon, milk, and egg yolks. Stir thoroughly.
Set the pan over medium heat and cook gently, stirring constantly, until the mixture just begins to thicken, then immediately remove it from the heat.
Do not let it boil! If the mixture comes close to boiling the egg yolks will curdle. (If this happens to strain the mixture through a sieve or puree in a blender.)
Remove the mixture from the heat and let it cool.