Roast the sesame seeds in a dry pan until golden yellow, stirring constantly, and remove.
Peel the bananas and halve each 1 x lengthways and 1 x crosswise. Slowly heat 3/4 of the coconut milk in a high-walled pan. Add the brown sugar and salt and stir until it has completely dissolved. Put in the banana pieces and cook for 2 - 3 minutes.
Heat the rest of the coconut milk in it, but do not boil it.
Arrange everything on four plates and sprinkle with the sesame seeds.