Each school is different, at HKUST, they have massive cafeteria complexes serving a whole host of food at very cheap prices and a restaurant on campus. When I exchanged to Berkeley, they had a cafeteria on campus but the selection was limited and costly compared to HKUST, so I cooked more often.
Cooking shouldn't be a problem, there are plenty of dishes that take 20 minutes, or you can do some roasting.. prep time = 10 mins, then the cooking part you can do some work/reading whilst you wait for it to be done in the oven. Can even make it into a social/co-work event. Invite your 'assignment team' round, bung something in the oven, and do some work whilst its cooking, eat dinner, finish off work, and socialise. (* decent cooking skills maybe necessary to be able to do the cooking part efficiently)