How can urban gardening initiatives contribute to addressing food deserts in metropolitan areas?

Food deserts are urban areas where residents have limited access to affordable and nutritious food options. These areas tend to be low-income neighborhoods, often lacking supermarkets or grocery stores. Urban gardening initiatives have been proposed as a solution by promoting local food production and empowering communities. This approach involves transforming vacant lots and rooftops into gardens that can yield fresh fruits and vegetables. However, the success of such initiatives depends on factors like community involvement, local government support, and accessible gardening resources. Can these urban gardening efforts effectively reduce or even eliminate food deserts, and what challenges do they face in achieving this goal?