Ingredients

2 tablespoons freshly grated ginger, with juices

2 tablespoons low-sodium soy sauce

5 tablespoons freshly squeezed lime juice

2 tablespoons olive oil

1/4 teaspoon freshly ground black pepper, plus more to taste

2 pounds leeks, trimmed, cut across into 3/4-inch rings, and washed

2 pounds plum tomatoes, quartered into wedges

6 five to six-ounce cod fillets, or steaks, skin on, 1 to 1 1/4 inches at thickest point

Salt to taste

1 pound fresh spinach, well washed

Olive-oil cooking spray

Preparation

Heat oven to 425 degrees with two racks centered. Spray two 12-by-14-inch roasting or jelly-roll pans with cooking spray. In a small bowl, combine ginger, soy sauce, lime juice, olive oil, and pepper. Set aside.

Arrange leeks and tomatoes in one pan, and cod (if using fillets, place skin-side down) in the second pan. Brush all liberally with ginger marinade. Sprinkle all with salt and pepper. Cook 10 minutes. Turn vegetables with a spatula for even browning; brush all again with marinade. Continue to cook until cod is opaque throughout, 2 to 4 minutes more. Transfer cod to a serving plate; keep warm. Continue to cook tomatoes and leeks until tender, 10 to 15 minutes. Add spinach to pan; cook just long enough to wilt, about 5 minutes. To serve, arrange spinach on each plate. Add 1 cod fillet; divide tomato-leek mixture evenly between plates. Serve hot.