Paper-thin slivers of radish and fennel tumble among ribbons of carrot in this colorful celebration of spring. Parsley, cilantro, and lemon add brightness, while nutmeg adds a twist all its own. With its thick texture, halibut can dry out all too easily. Your best bet is to slow-roast, poach, or broil. The broiler is foolproof, as the ambient heat of the oven will slowly cook the fillet.