Tomatoes, Mozzarella, Basil, Olive oil, Balsamic Vinegar
Originally uploaded by J*A*M*I*E
Roma tomatoes (now you know why they're called Roma).
Mozzarella cheese, or provolone, which is somewhat smokier in flavor.
Basil (a package of fresh basil leaves males a killer addition to sandwiches, etc)
Olive oil (expensive but worth every drop, imho).
Balsamic Vinegar (buy a bottle of this and you'll find many times to use it, such as an appetizer of olive oil and balsamic vinegar into which you dip bread or crackers).