Puree the bananas in a blender with some water or with a hand blender.
Place the remaining ingredients in a bowl and mix well until a thick batter forms, roughly the consistency of spaetzle dough. Add a little water if needed.
Heat frying oil in a deep fryer or a medium-sized pot
Form balls about 3 cm in diameter with your fingers and carefully slide them into the oil
Fry the balls for about 3 minutes, stirring constantly, until they are golden brown
Remove with a slotted spoon and drain on kitchen paper