Now, even though you won't have access to a stove, if you can get an electric kettle, you can have boiling water for pasta or rice or whatever.
I'm sure that your college cafeteria will have a salad bar, so there's no real need to have lettuce or salad things.
During the winter, make or get prepared soups (many are actually vegan if you look in the right places, I know that my local grocery store actually carries Amy's brand soups, which are vegan/vegetarian.) and warm them up in the microwave.
Of course, have lots of staples. Dried beans, rice, noodles, peanut butter, bread... It will be easier after the first month or so when you start getting accustomed to college life.