01 - Combine diced mangoes and lemon juice in a blender or food processor. Blend until completely smooth, approximately 1-2 minutes.
02 - In a medium saucepan, whisk together granulated sugar and cornstarch until evenly combined.
03 - Pour mango purée and coconut milk into the saucepan with the sugar-cornstarch mixture. Whisk thoroughly until no lumps remain and mixture is uniform.
04 - Place saucepan over medium heat. Cook while whisking constantly until mixture begins to thicken and bubble, approximately 5-8 minutes. Ensure you reach the edges of the pan while whisking to prevent scorching.
05 - Remove saucepan from heat immediately once thickened. Stir in vanilla extract and turmeric if using for enhanced color.
06 - Transfer curd to a clean jar or bowl. Allow to cool at room temperature for 30 minutes, then refrigerate for at least 2 hours to achieve proper set consistency.
07 - Serve chilled as a spread on toast, swirled into yogurt, or as a layer in desserts. Store refrigerated for up to one week.