How to Make It
In a bowl, toss the shrimp with 1 teaspoon of the lime juice, 1 teaspoon of the minced shallots and the pinch of turmeric. Let marinate at room temperature for 20 minutes.
In a bowl, beat the coconut milk with the egg. Stir in the remaining lime juice, shallots and turmeric, plus the minced chile, lemongrass, tamarind liquid, fish sauce, sugar and salt. Pour the mixture into six 1/2-cup ramekins or heatproof bowls and set 3 shrimp in the center of each. Arrange the ramekins on a wide rack set in a wok or large saucepan over 2 inches of simmering water. Wrap foil around the rack to secure, if necessary. Cover the wok and steam over low heat until the custard is just set and the shrimp are cooked, about 8 minutes. Garnish with the chile slices and coriander and serve.