4 potato cakes |
1/2 teaspoon freshly ground black pepper, divided |
2 tablespoons fresh lemon juice (1 lemon) |
2 tablespoons dry white wine |
1 tablespoon extravirgin olive oil |
1 tablespoon water |
1 tablespoon dijon mustard |
1 tablespoon drained capers, minced |
1/8 teaspoon salt |
4 (6-ounce) skinless salmon fillets |
olive oil-flavored cooking spray |
4 cups gourmet salad greens |