2 fresh or frozen tuna steaks, 1-inch thick (about 1 lb. total)
1 Tbsp. olive oil
1 Tbsp. orange juice
1/3 cup mayonnaise or salad dressing
1/4 cup finely chopped red onion
1 tsp. finely shredded orange peel (set aside)
1/2 of a medium orange, peeled, seeded, sectioned and coarsely chopped
1 tsp. snipped fresh rosemary
1/4 tsp. fresh ground pepper
Thaw tuna, if frozen. In a small bowl combine olive oil and orange juice. Brush tuna with oil mixture. For a charcoal grill, grill tuna directly on the greased rack of an uncovered grill over medium heat for 4 to 6 minutes or until tuna is slightly pink in the center, turning once halfway through grilling. (For a gas grill, preheat grill. Reduce heat to medium. Place tuna on the greased rack over heat. Cover and grill as above.) Remove tuna from grill. Cover and chill tuna for 1 hour or until completely chilled. Slice to serve.
Meanwhile, in a small bowl, combine mayonnaise, onion, chopped orange, rosemary, and pepper. Divide tuna portions among 8 serving plates. Top each tuna piece with 1 tablespoon of the mayonnaise mixture. In a small bowl combine orange peel and snipped rosemary. Sprinkle atop each serving and serve with crackers if desired.