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