Doctor said to start baby on meat first, not rice pablum!?

The pediatrician told me that new research shows you should do meats, then cereal, then veggies, then fruit has anyone tried this and how did it go? My son is a bit young yet but just trying to think ahead. When I looked at the jars of food after we chatted about this, there was no straight meat ones, just turkey and squash, beef and vegetable. I generally plan to make my own but was wondering then if I give him straight turkey or mix it with a bit of sweet potato or squash or something like that. Thank you all!