Welcome to ATP, George!
I think that in terms of vegetable gardening there really aren't many things that are drought tolerant so your best course would be to use water-conserving practices. A heavy mulch can do wonders in helping to retain moisture in the ground, rain barrels to catch whatever rain you may have, maybe consider a drip irrigation system that would put water right at the base of the plants, where it is most needed. Control weeds so they aren't using the moisture that your garden plants need. Increase the amount of organic matter in your soil, which will help retain the moisture content. Use something like the "square foot gardening" system of planting so things are grouped more closely and you are watering less bare ground.
Your local extension service may have some good advice for vegetable gardening in that area, as well.
