Blackened Salmon Caesar Salad

Name: Blackened Salmon Caesar Salad
Ingredients: Blackening Seasoning; 2 tablespoons paprika; 2 teaspoons onion powder; 2 teaspoons garlic powder; 1 teaspoon cayenne; 1 teaspoon white pepper; 1 teaspoon black pepper; 1 teaspoon thyme; 1 teaspoon oregano; 1⁄2 teaspoon sugar; 2 teaspoons salt; The Rest; 4 (4 ounce) skinless boned salmon fillets; nonstick cooking spray (see note); 2 heads romaine lettuce, cleaned, dried and torn; 3⁄4 cup grated parmesan cheese; 1 cup caesar salad dressing (to taste); 2 cups toasted croutons; lemon wedge (to garnish)