This report examined the activity 4 (Step 3) RTBfoods processing diagnostics on Gari/Eba product profile in Nigeria. The Processing activity was carried out in South East region of Nigeria (Abia State, Ossah Ibeku in Umuahia North Local Government Area). Four (4) champion Gari Processors were selected from the study area for the activity and also four (4) Cassava varieties chosen based on the information derived from the activity 3 of what traits constitute good and bad variety. The Cassava varieties used were TMS 01/1368, TMS 98/0505, TMS 01/1412 and Nwaocha (Which is a local variety). Exactly 35kg each of the four varieties was used for the processing diagnostics and distributed among the four processors randomly and coded thus; Variety A, B, C and D. The result showed that the best processing yield was obtained for the variety Nwaocha with a yield of 24.0% (w.b) followed by TMS/98/0505 with 20.0%. This can be explained by their high dry matter content at raw material level. Conversely the lowest yields have been obtained with the varieties TMS/01/1368 and TMS/01/1412 with 10.0 and 14.7% yield respectively; these two varieties had the lowest dry matter content at raw material level. Empirically, it was observed from the study that Nwaocha and TMS/98/0505 performed better than other varieties selected for the study, even though Nwaocha did not come out fine because of processor effect during processing, all the processors gave credit to Nwaocha especially, as the best cassava variety being selected Therefore, effort should be made to develop/select varieties with high starch, dry matter and low moisture and low fibre content for food security and income.