Poached Whitefish in Butter & White Wine Sauce (A.K.A. "Boiled Trout")

Ingredients

• 2 whitefish fillets, about 1/3 pound Any whitefish will do, including cod, swai, tilapia, trout, milkfish, etc.
• 1/2 of a baguette or other crusty loaf of bread, cut into 1/2 inch rounds.
• 1 Tablespoon butter, for toasting bread
• 1/2 cup butter, for sauce
• 1 cup white wine
• 1 2-inch knob of ginger, peeled and sliced or grated.
• 2-4 sprigs fresh rosemary
• Salt, to taste