Peel the oranges, divide them into wedges and dice them into small pieces. Peel the apples, remove the core and also dice. Peel the bananas, halve if necessary and cut into slices approx. 3 mm thick. Crack the nuts and grate them finely. Finely grate the block chocolate as well. Mix everything and add the rum or brandy. If children are also eating, you can separate everything into two bowls before adding alcohol and only add alcohol to one. Cover and refrigerate for several hours, preferably overnight.