1/4 cup light coconut milk, divided |
6 tablespoons fresh lime juice (about 4 limes), divided |
4 (6-ounce) mahimahi or other firm white fish fillets |
1 1/2 cups diced peeled ripe mango (about 1/2 pound) |
3/4 cup diced english cucumber (about 1/2 medium) |
1/3 cup finely diced red bell pepper |
2 tablespoons minced red onion |
1 tablespoon chopped fresh cilantro |
1 teaspoon minced peeled fresh ginger |
1 serrano chile, minced |
3/4 teaspoon kosher salt, divided |
1/4 teaspoon freshly ground black pepper |
cooking spray |
lime slices (optional) |
cilantro sprigs (optional) |