Climate change and population growth are crippling global food, energy, and water resources and we’re running out of fresh water to grow food. People in food insecure countries like Ethiopia and Nepal are already suffering with nearly fifty percent of children under five experiencing growth stunting. We must adopt ways to grow more food with less water, and we must do it now. Energy is also needed along every step of food production, so any solution to increase harvests must embrace this food, energy, water nexus. Previous efforts have largely focused on only one aspect of the nexus or national level interventions, but we need holistic, local, community-driven solutions to effect change. Our proven low-cost solution addresses this need through three components: on-farm horticultural water reuse and renewable energy technologies, community-driven capacity-building, and experiential STEM education. Our multinational University and NGO partners are already implementing this solution in Ethiopia. We measure success by monitoring increases in crop yields, reductions in water and energy footprints, and improvements in diets at the community level. Support from the MacArthur Foundation will enable us to reach other vulnerable communities in Ethiopia and Nepal, improving food security for tens of millions of people. We will then share our solution globally, building climate resilience and sustaining food security for all.