Caramelize the almond flakes in a pan with a little butter and a little sugar. Bring the sugar, vanilla sugar, orange juice and strawberries to the boil. Puree the mass. Add the Grand-Marnier and put everything in a pan.
Peel the bananas and halve lengthways, heat them with the strawberry sauce until they simmer gently. Spread the cognac over it and light it.
Serve the bananas and the strawberry sauce with a scoop of vanilla ice cream each. Scatter the caramelized almond flakes on top.