if I recall, the MSSRF (M.S. Swaminathan Research Foundation) in India is promoting millet cultivation, conservation and value addition to enhance food security and nutrition for rural poor through IFAD supported programmes among others. You may be aware of MSSFRF’s work on promotion of millets and indigenous foods for nutritional security. Here is a link to a 2009 Report on MSSRF's work.
On impact studies, WFP/IFPRI have demonstrated impacts on food consumption and nutritional status though the links were not completely conclusive.
Certainly, introduction of nutritious millets (which are underutilized) in safety net programmes in South Asia would help to improve dietary diversity and nutrition outcomes. I attach a useful document which illustrates experiences from Africa and Asia. In particular, the India case is relevant on the availability/use of cereals other than rice and wheat in food aid which will help Salome to explore this issue.
I will share other papers as I find them.