In a medium saucepan, mix together the cornstarch and about half of the cashew milk until combined. Add the rest of the cashew milk, coconut milk, sugar, maple syrup and salt.
4 1/2 teaspoons (15 grams) cornstarch, 3/4 cup (175 ml) cashew milk, 3/4 cup (175 ml) canned full-fat coconut milk, 3 tablespoons granulated sugar, 3 tablespoons maple syrup, pinch salt
Bring to a simmer while stirring frequently to make sure that the cornstarch doesn't stick to the bottom.
Let it simmer for about 1 minute, stirring frequently, or until thickened and it coats the back of a spoon. Don't let it simmer too long or it'll separate (possibly later in the fridge).
Add the vanilla, stir and then add tiny, tiny amounts of turmeric until it's more golden (note that the custard appears overly yellow in some browsers). It'll thicken a little bit more as it sits. The flavor also improves if you let it sit about an hour. Serve warm or room temperature. Do not try the custard and put that spoon back in the custard or it'll separate in the fridge.
1 1/2 teaspoons vanilla extract, pinch dried turmeric
Store in an airtight container in the fridge for up to 5 days.
After it's refrigerated, gently warm before pouring over your desserts.