=== SAUCE ===
1/3 cup non-fat mayonnaise
1 Tbs fresh lemon juice
1/8 tsp oriental sesame oil
1 1/2 tsp grated fresh ginger
1 1/2 Tbs whole-grain mustard
1/8 tsp garlic powder
Freshly-ground black pepper, to taste
=== BURGERS ===
3 six-inch whole-wheat pita loaves
6 fresh tuna fillets - (5 oz ea)
Olive oil cooking spray, as needed
1 tomato - (8 oz), sliced thin
6 lettuce leaves
6 thin slices red onion


Prepare the coals for grilling or light the grill.
In a small bowl, combine the mayonnaise. lemon juice, sesame oil, ginger, mustard, garlic powder, and pepper. Set aside.
Cut each pita bread in half to form 6 pita pockets. Lightly brush the insides of the pita pockets with ginger sauce. Wrap in aluminum foil and place on grill to warm. Remove to outside edge of grill just to keep warm.
Lightly coat the tuna filets with cooking spray. Pat with pepper and grill on both sides until pink in middle, about 3 minutes per side. Remove from the grill.
To serve, place a fillet in each pocket. Top with lettuce, tomato and onion slice. Top with ginger sauce and serve immediately.