Drying Banana Slices?
I slice ripe bananas quarter inch thick and place them on drying trays of a small food dryer that cost about $30 US. You can make your own food dryer using a box of your choosing, light bulbs and a small fan or make a solar dryer with just thermal air flow...
Duros Recipe?
Stick a few duros in the microwave for a few seconds and watch what happens. Since I do not know what power level your machine is I can not give a recipe. Best you try a few at a time at various power/time levels and watch the duros as you go. Shut the microwave...