Green bananas do not look attractive to people until they get the yellow color, which sometimes does not happen so quickly.
However there is one trick you can use, using a micro oven.
First, take a tablespoon or a fork and slice the bananas so that the heat can penetrate into them, put one banana every one at a time after 30-60 seconds, and that’s it.
When you remove bananas, it will probably seem like they look horribly, but the texture will be perfect as a ripe banana.
After the banana is ready, let it cool down and you can immediately consume it.