Place the Bird's Custard into a medium saucepan and add the coconut milk. Whisk thoroughly to combine and then turn on the heat to medium. Continue to whisk till the custard comes to a boil and thickens.
Add the mango pulp and whisk well to combine, again stirring till it comes up to the boil and gets thicker.
Remove from the heat and pour into a bowl. Zest the lime into the custard mixture, then cut the lime in half and squeeze the juice into the custard as well. Add the tequila and a pinch of salt, and then whisk well to combine.
Place in the fridge to cool down, about an hour.
Freeze according to your ice cream maker manufacturer's directions. Mine took about 20 minutes in my Cuisinart.
Remove from the ice cream maker into a container and place in the freezer to solidify.
Serve with a sprinkle of tajin or a drizzle of Bee Mindful Hot Hunnie.