For the semolina soufflé, place milk, butter, vanilla pulp and vanilla bean in an unperforated cooking container and heat (at 100°C for 5 minutes).
Remove the steamer basket. Stir in semolina and let rest for 1-2 minutes. Stir again and cook again. Stir once during cooking (at 100°C 1 minute).
Remove semolina mixture, stir and let rest covered for 5 minutes. Allow semolina mixture to cool and remove vanilla bean. Stir in yolks.
Beat egg whites with sugar until stiff and fold into semolina mixture.
Grease 8 small soufflé molds or cups and sprinkle with sugar. Pour in the mixture and cover loosely with aluminum foil. Put the molds on the grill and cook (at 90°C for 25-30 minutes).