ok so I got this serloin tip roast from the store I wanna make. It's about 2.5lbs. Then only thing is ingredients are a bit scarce. I've heard you can cook a roast in beer? (only non-scarce ingredient available) and I've got S&P, garlic, baby carrots...um, green pepper(don't know what good that would do. got some potatoes as well if you can make that with roast? and also i'm not sure if a roast has to be covered but i only have 1 pan with a lid and it's too shallow to hold the whole roast covered so i would either have to slice the roast in half to make it not so tall, or cook it uncovered. any thoughs from our master chefs out there?