01 - Combine diced mangoes and lemon juice in a blender or food processor. Process until completely smooth, approximately 1-2 minutes.
02 - Whisk together sugar and cornstarch in a medium saucepan until evenly incorporated.
03 - Pour mango purée and coconut milk into the saucepan. Whisk vigorously until mixture is uniform and no lumps remain.
04 - Place saucepan over medium heat. Cook while whisking constantly until mixture begins to thicken and bubble, approximately 5-8 minutes. Continue whisking to prevent scorching.
05 - Remove from heat immediately. Stir in vanilla extract and turmeric if using for enhanced color.
06 - Transfer curd to a clean jar or bowl. Allow to reach room temperature, then refrigerate for minimum 2 hours to achieve proper consistency.
07 - Serve chilled as a spread for toast, swirl into yogurt, or use as dessert filling. Refrigerate for up to 1 week.