Sirloin of Beef Joint...1.1kg, how do I cook?

[Eggybreadwithnuts]

Butcher wasnt much help, said cook fast not slow.

How would you cook a 1.1kg roolled Sirloin?

Ah ok thanks I looked at it and thought it's trally very brown...its going to burn!

20 mins left...my timers on 🤦‍♀️

UPDATE
So it was 95% perfect, more medium to well done so perhaps 5-10 mins less next time. But juicy and soft.

Sounds perfect