Preparation Prepare barbecue (medium-high heat). Whisk first 3 ingredients in medium bowl. Season with salt and pepper. Set aside. Make three 1/2-inch-deep diagonal slits in skin on each side of fish. Brush fish generously inside and out with garlic oil. Sprinkle fish inside and out with coarse salt. Stuff slits with half of fennel fronds. Place remaining fennel fronds inside fish. Place fish in grilling basket. Top fish with lemon slices, overlapping slightly. Close grilling basket (fish and lemon slices should be secured by basket). Grill fish until cooked through, about 10 minutes per side. Remove fish with lemon slices from basket and carefully transfer to platter. Serve.
Preparation Prepare barbecue (medium-high heat). Whisk first 3 ingredients in medium bowl. Season with salt and pepper. Set aside. Make three 1/2-inch-deep diagonal slits in skin on each side of fish. Brush fish generously inside and out with garlic oil. Sprinkle fish inside and out with coarse salt. Stuff slits with half of fennel fronds. Place remaining fennel fronds inside fish. Place fish in grilling basket. Top fish with lemon slices, overlapping slightly. Close grilling basket (fish and lemon slices should be secured by basket). Grill fish until cooked through, about 10 minutes per side. Remove fish with lemon slices from basket and carefully transfer to platter. Serve.