Quick! I need your favourite beef roast recipe!

[Kiki]

Okay, I hate to admit it but I've never made a roast without a crockpot before. Kinda scary. I'm reading all this stuff about searing the meat in a pan, searing it under high heat, lowering the heat, time to cook for medium rare, etc. I'm confused. I have a 1 kg sirloin roast (that's 2.2 lbs) that I want yummy and medium rare. Help this poor confused cook, please?

And what do you do for a gravy and veggies? I think I'm going to do sweet potatoes and homemade gravy but I don't know how many drippings I'll get from a 2 lb roast.