Place the corn in a mesh strainer and run cold water over it. Set aside to drain and continue thawing.
¾ cup frozen corn
In an 8- or 10-inch skillet, bring 1 cup of water to boiling over medium-high heat.
Add the salmon, cover, return to a boil, then reduce the heat to medium-low. Simmer for about 7 minutes or until the fish flakes easily with a fork. Remove from heat.
¾ pound salmon fillets
In a 3½-quart saucepan or small stockpot, heat the oil over medium heat. Add the bell pepper and white parts of the scallions. Cook, stirring frequently, until the vegetables begin to soften.
1 tablespoon extra-virgin olive oil, ½ medium red or orange bell pepper, 3 medium scallions
Combine the flour, salt, pepper, cayenne, and chili powder in a small bowl. Add the mixture to the saucepan and stir for 1 minute or until the flour is well incorporated.
1½ tablespoons white, wheat, or all-purpose flour, ¼ teaspoon kosher salt, ¼ teaspoon freshly ground black pepper, ¼ teaspoon cayenne pepper, ¼ teaspoon chili powder
Gradually stir in the clam juice and broth, scraping up the bits from the bottom of the pan. Add the potatoes, cover, and bring the mixture to a boil over high heat. Reduce the heat to medium-low and simmer, stirring occasionally, for about 15 minutes or until the potatoes are tender.
8 ounces clam juice, 1 cup low-sodium vegetable broth or seafood stock
Add the milk and corn to the saucepan, increase the heat to medium, and cook for an additional 2 minutes.
1 cup 1% milk
Remove the salmon from the skillet and flake it with a fork. Gently stir the fish into the chowder and let it heat through.
Spoon the chowder into 4 serving bowls, then top with the green parts of the scallions and the avocado.
1 medium avocado, 1 lime