DIRECTIONS
In a small bowl, combine the first four ingredients.
Pour half of the marinade into a large resealable plastic bag.
Add the tuna; seal bag and turn to coat.
Refrigerate for 30 minutes.
Refrigerate the remaining marinade.
Drain fish; discard marinade.
Moisten a paper towel with cooking oil and lightly coat the grill rack.
Grill tuna, covered over high heat for 5-10 minutes, testing with a fork for doneness.
Drizzle with the reserved marinade.
Serves 6.