Preheat the oven to 180 C. mix the eggs with the sugar and whisk it well. Stir the cornflour into the milk and ad this to the egg mixture. Add the flour and whisk until well combined.
Cut the banana into slices and put in a bowl with a bit of sugar and the crumbled oreo cookies. Grate the zest of the lime over it and mix well. Butter a few ovendishes
and put the banana and oreo mixture at the bottom. Don't be too careful there. Just fill it nicely. Pour the eggmixture on top just below the edge. Put the bowls into the oven and let them bake for about 40-45 minutes