1 cup halved grape tomatoes |
1/2 cup vertically sliced red onion |
3 tablespoons chopped fresh cilantro |
2 tablespoons fresh lime juice |
3/8 teaspoon salt |
1/2 teaspoon freshly ground black pepper |
2 avocados, peeled and diced |
2 garlic cloves, minced |
1 jalapeño pepper, seeded and finely chopped |
2 tablespoons lower-sodium soy sauce |
2 teaspoons dark brown sugar |
cooking spray |
4 (6-ounce) tuna steaks |
