Oak-Planked Peppercorn Tuna Steaks with Orange Mayonnaise

Ingredients

• 1 (15 x 6 1/2 x 3/8-inch) oak grilling plank
• ¼ cup low-fat mayonnaise
• ¼ teaspoon grated orange rind
• 2 tablespoons mixed peppercorns, crushed
• 2 tablespoons fresh orange juice
• 4 (6-ounce) Bluefin tuna steaks (about 1 inch thick)
• ½ teaspoon salt
• + 2 more ingredients
• • Cooking spray
  • 2 teaspoons chopped fresh chives

Immerse and soak plank in water for 1 hour; drain. Prepare grill, heating one side to medium and one side to high heat. Combine mayonnaise, rind, juice, and chives; stir well with a whisk. Chill. Lightly coat top of tuna with cooking spray. Sprinkle the tuna with salt; firmly press peppercorns in...

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