Orange Fennel Seared Tuna Salad

INGREDIENTS

• 1 tablespoon fennel seed
• 1 whole star anise
• 1 tablespoon whole black peppercorns
• 4 teaspoons dried orange peel
• 2 teaspoons ground ginger
• Pinch of ground cloves
• 1/4 teaspoon ground cumin
• 1 1/2 teaspoons coarse salt
• 2 teaspoons sugar
• 1 1/4 pounds tuna steak
• Juice of 1 orange
• 1 tablespoon white-wine vinegar
• 1/4 teaspoon freshly ground black pepper
• 2 tablespoons plus 1 teaspoon extra-virgin olive oil
• 1 head red-leaf lettuce, torn into bite-size pieces
• 1 cucumber, cut into 1/2-inch-thick rounds
• 1/2 medium red onion, cut into thin moons
• 1/2 pint cherry tomatoes, cut in half
• 3 ounces feta cheese, for garnish