- Fill a large sauté pan or stockpot with enough water to cover seafood; bring to a simmer. Rinse any ice glaze from frozen Alaska Cod under cold water. Turn off heat and gently add seafood to water; return heat to a simmer. Once simmering, cover pan tightly and cook 4 to 5 minutes for frozen seafood or 2 minutes for fresh/thawed fish. Turn off heat and let seafood rest in liquid for 5 minutes, or until seafood is opaque throughout. Remove cod from water; cool slightly and flake into small pieces.
- Stir together cod flakes, mashed potatoes, green onion, parsley, thyme, garlic and egg, just until blended. Season with salt and pepper. Divide mixture into 1/4 cup portions; flatten each portion into 3-inch diameter patties. Heat butter/oil mixture in a pan over medium heat. Add cakes (in batches) and sauté until browned on both sides; keep warm.
- Blend together goat cheese, yogurt, lemon juice, zest and green onion to make sauce. Serve sauce with cakes.