I would just take roti from home cos its more tasty, more filling and healthier. Honestly its the best thing u will do/ ALSO its not such a big deal as many people make out.
At uni - a lot depends on your campus and what selection they have...if they don't have much then speak to them and bring about change via the union!
The things u probably need to try out are these - Rice, vegetable curry, naan, samosa's, spinach pie (omg this is so the best. You eat it and feel like pop eye!), soup and bread. Also always buy a dessert eg yogurt, orange, apple to go with it. I really like pineapple and cherry's...lol Finally drink fresh Juice not fizzy! Ideally buy mineral water too!
Other things to consider
- sandwiches - different types as can be baguettes etc but can have houmous instead of cheese or some have chutney (this is yuk!), some just margarine on its own - Wraps - I prefer these...once I had onion bhaji.....and erm cheesy wrap!
- Junk food - pizza, pasta, wedges, burgers and fries
- Hot food - panini, jacket potato and beans, spring rolls