This outcome evaluation applies a complexity-aware, systemic approach to assess the Agroecology and Safe Food System Transitions (ASSET) project in Vietnam, with a focus on its implementation in Dien Bien and Son La provinces. The project was implemented from 2020 to 2025. It aimed to transform food and agricultural systems into more sustainable, safe, and equitable models through agroecology. Using the Outcome Harvesting methodology, the evaluation identified and validated three key areas of change: adoption of agroecological practices, strengthening of the ALiSEA network, and policy and agenda setting. These outcomes were substantiated through 39 in-depth interviews with a diverse group of stakeholders, including farmers, extension agents, government officials, researchers, and NGO representatives. Stakeholder Perspectives Project implementers and key informants shared diverse interpretations of agroecology. Most implementers viewed it as an integrated farming system that balances production, environmental protection, and human well-being. Key informants emphasized its role in biodiversity conservation and ecological sustainability. Despite varying interpretations, both groups agreed on agroecology as a context-sensitive and sustainable approach. Stakeholder engagement varied according to differentiated institutional roles. Provincial government officials focused on policy integration, while national researchers highlighted long-term involvement in sustainable agriculture. NGOs emphasized continuity, viewing ASSET as an extension of already existing commitments. A common theme across all groups was a shift from fragmented, component-based thinking to system thinking and integrated approaches. Outcomes Achieved The evaluation validated three core outcomes: • Adoption of agroecological practices: Confirmed by 26 respondents, this outcome reflects the uptake of practices such as composting, silage production, intercropping, and tree shading. These practices have crea