Chilled Coconut Corn Soup

Melt coconut oil over medium heat in a large pot. Add onion, ginger, tumeric, and 1/2 tsp. salt and cook, stirring occasionally, until onion is translucent, 8 –10 minutes. Break corn cobs in half and add to pot along with corn kernels, potato, coconut milk, lime zest, and 1 1/2 cups water. Bring to a boil over high heat, then reduce to a simmer and cook until potato is tender, 20 –25 minutes. Discard corn cobs and lime zest, then transfer soup to a blender. Add 1/2 tsp. salt and purée until smooth. Let cool to room temperature. Transfer to a large bowl and chill, covered, at least 2 hours. Meanwhile, preheat oven to 350 °F. Spread coconut flakes on a small rimmed baking sheet and toast, tossing occasionally, until golden, about 5 minutes; transfer to a plate. Stir lime juice into soup and adjust seasonings, thinning with water, if needed. Divide soup among bowls, then top with toasted coconut, avocado, and cilantro. Serve with lime wedges alongside.