Put the milk in a container suitable for microwaves and bring to the boil in the microwave at full power for approx. 4 minutes. Then add the semolina and sugar and stir everything for about a minute. Then let the semolina swell for about 5 minutes. Stir the semolina again and serve.
If the semolina is still too runny after swelling, simply put it in the microwave again for 1-2 minutes and then stir.