Grilled Snapper in Coconut Sauce

Name: Grilled Snapper in Coconut Sauce
Ingredients: 1 (2- to 2 1/2-pounds) whole red snapper, cleaned and scaled; 1/3 cup fresh lime juice (from 3 limes); 3 tablespoons minced peeled fresh ginger; 4 garlic cloves; 1 to 2 red piri piri chiles, Thai chiles, or similar chiles, seeded and chopped (about 1 teaspoon); 1 green Thai chile, seeded and chopped (about 1 teaspoon); 1/2 teaspoon black pepper; 1 cup well-shaken and stirred canned unsweetened coconut milk (such as Thai Kitchen Organic); 2 tablespoons tamarind concentrate (such as Tamicon); 1 tablespoon tomato paste; 1 teaspoon ground turmeric; 1 teaspoon chopped fresh cilantro stems; 1 tablespoon coarse sea salt, divided; Canola oil, for grilling basket; Cooked coconut rice, for serving