Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Line two baking trays with baking paper. For the dough, peel the banana and crush it with a fork in a mixing bowl.
Add soft margarine, sugar, cinnamon and 1 pinch of salt. Whisk with the whisk of the mixer until light creamy. Add flour and 2 tablespoons of rice drink. Stir briefly to a smooth dough.
Pour the dough into a piping bag with a medium star-shaped spout. Spray rings (approx. 5 cm Ø each) onto the trays. Bake one after the other in a hot oven for 9-11 minutes. Remove and let cool on a cake rack.
For the icing, stir icing sugar and 1-2 tbsp. rice drink to a thick icing smooth. Pour into a freezer bag. Cut off one corner and spray on the curls. Decorate with sugar beads. Let the icing dry.