1 tablespoon white sugar
3 cups bread flour
3 teaspoons baking powder
2 1/2 teaspoons baking soda
1 teaspoon salt
Combine cornstarch, sugar, soap, baking powder, soda and salt in a small mixing bowl. Make a well in the center and pour mixture into the bread pan without spreading. Let rest for 10 minutes, then turn out onto a small baking sheet. Cover and refrigerate overnight.
When ready to use, preheat oven broiler. Toast bread in preheated oven for 10 minutes, and place under broiler for 8 minutes, until golden brown. While still warm, slice bread bread into 1/2 inch slices.