Fillet of Cod Flemish Style

Name: Fillet of Cod Flemish Style
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: European
Ingredients: 4 tablespoons butter (1/2 stick); 1 onion, thinly sliced into rings; salt & freshly ground black pepper, to taste; 5 tablespoons fresh parsley, minced; 3 tablespoons fresh chives, minced; 1 lb cod fish fillet (or 4 individual steaks of cod, scrod, or halibut); 4 slices fresh lemon, peel and pith removed; 1 bay leaf; 1 sprig fresh thyme (or 1/2 teaspoon dried thyme); 2/3 cup dry white wine