How to Make It
In a bowl, mix 2 teaspoons of the sugar with the coriander, cumin, turmeric, pepper and 1/2 teaspoon of cayenne. Rub the spices on the chicken, cover and refrigerate for 1 hour.
Meanwhile, in a saucepan, mix the remaining 1/4 cup of sugar with the water and bring to a boil. Simmer until an amber caramel forms, 10 minutes. Off the heat, stir in the coconut milk until the caramel dissolves. Add the fish sauce and chile; let stand for 5 minutes. Strain the sauce and season with salt.
In a medium bowl, gently toss the fruits with a pinch each of salt and cayenne.
Light a grill. Rub the chicken with olive oil and season with salt. Grill over moderate heat, turning once, until the skin is charred and the chicken is white throughout, 12 minutes. Transfer to plates along with the fruit salad and sauce. Drizzle with olive oil, sprinkle with the cilantro and fleur de sel and serve.