Bring 500 ml milk and vanilla to the boil in a saucepan. Mix pudding powder, 2 tablespoons of sugar and 100 ml milk. Remove the pot from the hotplate, stir the custard powder into the milk and put it back on the hotplate.
Bring to the boil while stirring and let it boil for about 1 minute. Pour the pudding into a bowl and cover directly on the surface with foil. Let it cool down.
For the brittle, melt butter in a pan. Brown the nuts slightly while turning them. Sprinkle with 3 tbsp. sugar and caramelise while stirring. Put the brittle on a piece of baking paper and spread thinly.
Let it cool down. Crumble the brittle with your fingers. Mix cinnamon with 3 tablespoons of sugar. Peel and slice bananas, sprinkle with lemon juice.
Stir the pudding until smooth. Whip the cream until stiff, set aside 2 tablespoons of cream. Fold the rest of the cream and brittle into the pudding, except for a little bit for sprinkling. Turn bananas in cinnamon-sugar. Divide about half of the pudding into 4 glasses (approx. 350 ml each), add about half of the bananas.
Spread the rest of the pudding on top. Cover with remaining bananas. Put the cream that has been put aside as a blob on top. Sprinkle with brittle.