01 - Combine diced mangoes and lemon juice in a blender or food processor. Blend until completely smooth, scraping down sides as needed. For extra silky texture, press purée through a fine-mesh sieve before proceeding.
02 - In a medium saucepan, whisk together granulated sugar and cornstarch until evenly distributed and no clumps remain.
03 - Pour mango purée and coconut milk into the saucepan with the sugar mixture. Whisk vigorously until fully incorporated and smooth.
04 - Set saucepan over medium heat. Cook while whisking continuously for 5–8 minutes until mixture begins to thicken and bubble gently. The curd is ready when it coats the back of a spoon.
05 - Remove from heat immediately. Stir in vanilla extract and turmeric if using. The turmeric enhances the golden-yellow color naturally.
06 - Transfer curd to a clean glass jar or storage container. Allow to cool completely at room temperature, then refrigerate for at least 2 hours to achieve optimal consistency.
07 - Serve chilled as a spread on toast, swirled into yogurt, or layered between cake layers. Refrigerate in an airtight container for up to 1 week.