Set the oven to 180℃ (360℉) and prepare a slice tin or brownie pan.
Sift the flours, no egg, raising agents & into a large bowl. Mix thoroughly.
Chop the ginger into small slices or chunks then mix it, and the ground almond and sugar, into the dry ingredients.
Stir the wet ingredients together in a small bowl until everything blends well.
When the oven is hot, fold the wet ingredients into the dry ingredients, working quickly, stirring just enough to ensure the mixture is even. Spread it into the pan.
Bake for approx. 30 minutes.
While the slice is baking, mix the topping ingredients together in a small saucepan. Melt them on a low heat, stirring constantly. As soon as they blend, take the pot off the heat and put it aside. (You don’t want the sugar to crystallise).
When the slice is cooked, cool it for at least 10 minutes before taking it out of the pan. Spread the topping over it using a regular knife, then leave it to cool. When it’s cold, cut it into slices. At the end of the day, and from then on, store it in the fridge, maybe warming it a little slightly before serving.