Baked Cod Casserole

Dry white wine and Gruyère cheese give this fish casserole a rich flavor that hides its virtue. Before baking, we top the dish with seasoned whole-wheat breadcrumbs, which add a wholesome, nutty flavor and dietary fiber. For variety, you can substitute almost any mild white fish.

Ingredients

  • 2 tablespoons extra-virgin olive oil, divided
  • 2 medium onions, very thinly sliced
  • 1 cup dry white wine
  • 1 1/4 pounds cod (see tip), cut into 4 pieces
  • 2 teaspoons chopped fresh thyme
  • ½ teaspoon kosher salt
  • ½ teaspoon black pepper
  • 1 1/2 cups finely chopped whole-wheat country bread, (about 2 slices)
  • ½ teaspoon paprika
  • ½ teaspoon garlic powder
  • 1 cup finely shredded gruyere, or swiss cheese