Heat oil in a large deep pan. Add ginger garlic and fry for 1 minute. Add onions, and stir fry until dark brown.
Add water, and bring to a boil, turn to simmer.
Make toasts of bread, apply butter. Add sauce, salt, and pepper to soup. Mash bread lightly with back of spoon.
Mix cornflour in ½ cup water and add to soup. Boil for 1 minute.
Note: Yield: 5 Servings, Preparation Time: 25 Minutes, Degree of Difficulty: Easy