Cod at Easter is practically obligatory in Brazil, but salt cod can be hard to find, so here's a recipe for fresh. It works well with other fish as well.
Rinse the cod in water, pat dry and cut into 5cm pieces. Place in a greased baking dish.
Preheat oven to 220 degrees C. Top fish with lemon slices and onion rings.
Sprinkle the parsley over the top, season with salt and pepper and pour in the wine. Sprinkle with breadcrumbs, and distribute small pieces of butter over the top. Garnish with olives, to taste.