In Thailand, variations on this simple but spectacular whole grilled fish turn up at beachfront grill shacks and upscale restaurants alike.Plus: More Grilling Recipes and Tips
Make 3 crosswise slashes down to the bone on both sides of each fish. Place the fish in 2 large shallow glass baking dishes.
In a mini food processor, pulse the garlic with the cilantro, salt, coriander and white pepper until finely chopped. With the machine on, slowly add 2 tablespoons of oil and process to a paste.
Slather the paste in the fish cavities and slashes and spread any extra over the skin; refrigerate for 1 hour.
In a small bowl, whisk the fish sauce with the lime juice, sugar and 3 tablespoons of oil. Set aside for basting.
Light a grill. Lightly oil the grate. Grill the fish, covered, over a medium-low fire for about 25 minutes, basting twice and turning once, until cooked through. Transfer to a platter and fillet before serving with the Sweet Garlic Barbecue Sauce and lime slices.