1 tablespoon olive oil |
1 teaspoon kosher salt |
1/2 teaspoon freshly ground white pepper |
2 (12-ounce) portions tuna steak |
1/2 cup plus 1 tablespoon mayonnaise |
3 tablespoons finely chopped red onion |
6 tablespoons finely chopped celery |
1/4 cup sliced pimento stuffed green olives |
4 1/2 teaspoons sliced green onion tops (green parts only) |
1 tablespoon chopped parsley leaves |
1/4 teaspoon celery seed |
1/4 teaspoon freshly ground black pepper |
lettuce cups or sliced bread |