I'm starting a garden and want to prioritize crops I can grow for food in case of supply chain issues in future. Can you help me choose some plant species that will:

 - Provide enough caloric/nutrient content for two adults
 - Can survive in Hardiness zone 9-10
 - Can either grow in clay-heavy soil or in containers
 - Can survive short periods of frost
 - Minimizes water requirements
 - Crops have roughly 1/3 acre of shallow hillside to grow on, facing northeast