1 cup chopped cherry tomatoes |
2 tablespoons finely chopped green onions |
2 tablespoons chopped fresh parsley |
2 tablespoons capers |
1 tablespoon olive oil |
1 tablespoon balsamic vinegar |
1/4 teaspoon dried tarragon |
1/4 teaspoon salt |
4 (6-ounce) firm white fish fillets (such as cod, grouper, or mahimahi) |
2 teaspoons blackened seasoning |
cooking spray |
lemon wedges |