Snapper, Corn & Onion Salad with Creamy Lime Cumin Dressing

Ingredients

• 1 tablespoon chili powder
• 1 tablespoon ground cumin
• 1 teaspoon salt
• 1/2 teaspoon ground black pepper
• 1 small onion, cut into ½-inch-thick rings
• 3/4 cup fresh corn kernels
• 2 skinless red snapper fillets
• 2 tablespoons, divided, olive oil, divided
• 6 cups torn romaine lettuce
• 3/4 cup tomato chopped
• 1 cup Sour cream
• 1 1/2 cup whole milk
• 1 teaspoon lime zest
• 1/4 teaspoon salt
• 1/4 teaspoon ground cumin
• 1/8 teaspoon chili powder
• 1/8 teaspoon sugar