Creamy Halibut Olympia

Ingredients (16)

• + 1 pound halibut fillets add to pantry
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• + 1 tablespoon butter add to pantry
• + 1 onion, chopped add to pantry
• + ½ cup dry white wine add to pantry
• + ½ cup sour cream add to pantry
• + ½ cup mayonnaise add to pantry
• ✓ 2 cloves garlic, diced
• ✓ 1 ½ teaspoons seafood seasoning (such as Old Bay®)
• + ¼ teaspoon ground white pepper, or to taste add to pantry
• + ¼ teaspoon paprika, or to taste add to pantry
• ✓ 1 sprig fresh dill, chopped, or more to taste
• + 2 bunches green onions, chopped add to pantry
• + ¼ cup panko bread crumbs, or to taste add to pantry
• + 2 tablespoons drained capers, or to taste add to pantry