I'm glad you asked. With your climate and a little protection, you can make a year-round veggie production for your household (bioveggie.
). The key however lies in the soil - it should be
well-draining,
humus rich and
light soil that can easily be peneterated by the roots.
Also the pot doesn't need to be superbig, certainly smaller than banana pots, yet make sure that it's stable. Veggies like tomatoes can make it very unstable during windy weather, rains...
Terracotta pots hold the warmth slightly better than plastic pots (and have higher sun heat capacity), yet if you want a good insulation from the floor (!highly recommended), you should make sure that there's at least 5cm of solid plastic or other isolation between the floor and the pot.
Other than that? Nothing, just try... in your mini greenhouse.