3 tablespoons fresh lime juice
1 1/2 teaspoons finely grated lime peel
1/8 teaspoon (generous) piment d'Espelette or chili powder
3 tablespoons extra-virgin olive oil
Fleur de sel*
24 large sea scallops, side muscles removed, patted dry
3 firm but ripe nectarines (white or yellow), each cut into 6 wedges
Olive oil, for brushing
1 1/2 cups fresh corn kernels, cut from 2 large ears of corn
24 grape or cherry tomatoes, halved
1/3 cup thinly sliced basil leaves
Fleur de sel
Basil Puree:3/4 cup (loosely packed) fresh basil leaves
1/4 cup extra-virgin olive oil
Fleur de sel
Whisk lime juice, lime peel, and piment d'Espelette in small bowl. Gradually whisk in oil. Season with fleur de sel and pepper. DO AHEAD: Can be made 1 day ahead. Chill. Bring to room temperature before using.
Blanch basil in small pot of boiling salted water 30 seconds; drain. Squeeze to remove as much water as possible, then coarsely chop. Puree basil and oil in blender until smooth. Transfer to small bowl. Season to taste with fleur de sel. DO AHEAD: Can be made 1 day ahead. Cover and chill. Return to room temperature before using.
Prepare barbecue-can be a grill pan-(medium-high heat). Brush scallops and nectarines with oil; sprinkle with salt and pepper. Grill scallops until slightly charred and cooked through, about 2 minutes per side. Grill nectarines until slightly charred, about 1 1/2 minutes per side. Transfer scallops and nectarines to plate.