Swordfish Kebabs with Summer Herb Pesto

Ingredients

1. 1 pound skinless swordfish steak, cut into 1-inch cubes
2. 2 garlic cloves, smashed
3. One 2-inch piece of ginger, halved and smashed
4. 1 stalk of lemongrass, bottom 6 inches of the tender inner bulb only, thinly sliced
5. 1/4 cup plus 2 tablespoons vegetable oil
6. Salt and freshly ground pepper
7. 16 cipollina onions, peeled
8. 1 fennel bulb, cored and cut into 1-inch dice
9. 1 small zucchini, quartered lengthwise, seeded and cut into 1-inch pieces
10. 16 cherry tomatoes
11. Summer Herb Pesto
12. Aged balsamic vinegar, for drizzling
13. Finely grated zest of 1/2 orange, for garnish

1. In a bowl, toss the swordfish with the garlic, ginger, lemongrass, 1/4 cup of the vegetable oil and a generous pinch each of salt and pepper. Let stand at room temperature for 30 minutes.
2. Meanwhile, in a medium skillet, heat the remaining 2 tablespoons of oil. Add the onions and cook over moderate heat until lightly browned, about 2 minutes. Add the fennel and cook until lightly browned and crisp-tender, about 2 minutes longer.
3. Remove the swordfish from the marinade, scraping off the solids. Thread the swordfish, onions, fennel, zucchini and tomatoes onto eight 10-inch skewers and season the kebabs with salt and pepper.
4. Light a grill or preheat a grill pan. Grill the kebabs over high heat, turning, until lightly charred and the fish is nearly cooked through, about 5 minutes. Spread the Summer Herb Pesto on a large platter and arrange the kebabs on top. Drizzle lightly with balsamic vinegar, garnish with the orange zest and serve.