How do I cook a 2.7 Kg beef eye of round in a vacuum packed plastic bag in one sitting?

I only have salt and pepper, roommates might have some potatoes. I have a convection oven… I was thinking of putting the whole thing at 200 C at 8am and eat around 1 pm. I deliberately purchased for the marbling and I will not be throwing any fat away. Please no comments about my arteries clogging.