Mango, yoghurt pudding
1 very ripe and small mango
1/4 cup plain whole-milk Greek yogurt
1 tablespoons lucuma powder
¼ cup fresh lime juice, divided
1 teaspoon chia seeds
½ teaspoon nigella seeds
Peel mangoes and remove flesh from pits. Cut mangoes into ½" pieces; set aside ½ cup. Purée remaining mango, yogurt, lucuma powder, 2 Tbsp. lime juice, and a pinch of salt in a food processor or blender, scraping down sides and adding a splash of water if needed to loosen, until mixture is smooth. Divide between 2 glasses. Chill pudding 1 hour to firm up, if needed.
Toss reserved ½ cup mango with agave syrup, chia seeds, nigella seeds, a tiny pinch of salt, and remaining 2 Tbsp. lime juice in a small bowl. Top pudding with mango mixture.
Do Ahead: Pudding can be made 3 days ahead; cover and chill.