When you are buying banana stem from nearby market or store, try to select the ones which are fresh, white or cream with no discolouration at the centre. If the stem is tender, small, less fibre content.
Another point to keep in mind is the inner stem should not be too big or too small. If it’s too big, they will be more mature and highly fibrous. It becomes difficult to cut such banana stem.
The green sheath or layer outside is inedible and cannot be removed easily. This outer layer can be two or three layers depending on those available in the market. The outer layer is green when the plant is young and has few layers surrounding the inner pith. However, as the plant matures, this outer layer thickens and more in number.
Below this layer is the edible white, yellowish green pith. They are somewhat sweet and tart if you taste them.
If the inner pith is too small, you will have many outer layers to remove. So, select ones that are medium sized.
The first step is to prevent the discolouration of chopped stem before cooking. This can be done in many ways.
The second method is to add chopped pieces into tamarind water, this prevents discolouration.
Another method is adding this chopped banana stem to buttermilk. When you plan to cook, simply squeeze out the buttermilk and use the pieces. I have followed the second method
If you don’t find buttermilk, add 2 to 3 tablespoon of curd to water and then soak the chopped banana stem until use.