Add the vanilla and rum and cook for a further 5 minutes to glaze. Cool and spoon onto the coconut cream pie. Sprinkle over the lime zest and extra coconut to serve.
If you're dairy-intolerant, coconut milk and cream are an excellent alternative to cows' milk in some cooked dishes (provided you like its quite strong coconut flavour).
Using a glass pie plate helps — they brown the bottom of the crust a little better. What if the pie crust shrinks? If the crust shrinks, add whipped cream ... to 12 minutes. Cool crust ...