4 (6-ounce) skinless wild alaskan salmon fillets (about 1 inch thick) |
cooking spray |
1 teaspoon olive oil |
1/4 teaspoon salt, divided |
1/8 teaspoon black pepper |
1/2 cup chopped peeled cucumber |
1/2 cup plain fat-free greek yogurt |
1 tablespoon minced fresh mint |
2 teaspoons fresh lemon juice |
1/8 teaspoon ground red pepper |
8 (1-ounce) slices 100% whole-wheat bread, toasted |
1/2 cup trimmed watercress |