There are 12 or so cafés and fast food outlets in the terminal selling sandwiches, noodles and drinks. Most of these are found before Security, with just 2 coffee shops and 2 food outlets afterwards. If you're looking for international fast food, there's a KFC.
Stores and eating choices are limited at this terminal, so don't rely on doing any last-minute souvenir shopping here.
If you have time on your hands and would like to use the shops and restaurants in the public areas of Terminal 2, there's a passageway on the 2nd floor - it takes around 10 minutes to walk.