Mash the banana or use a blender to make a puree.

In a large bowl, add apple sauce, banana puree, vanilla extract, jaggery or raw sugar. Mix them well until the sugar dissolves and blends together.

Add dried fruits, chopped walnuts, if you desire so with the wet ingredients and mix well.

Add the baking soda mixture and mix them.

In a bowl, add the wheat flour and salt. If you plan to add flaxseed include now with the dry ingredients.

Now combine the wet and dry ingredients together. Pour the batter into a lined cake or bread loaf pan based on its size. If you prefer, sprinkle some rolled oats on top.

Now steam cook the batter for 40 to 50 minutes or until it is cooked thoroughly.