The blue zone diets, and to a lesser degree the diets of natural bodybuilders provide a fairly good answer to this question. Lots of vegetables, lots of legume

The blue zone diets, and to a lesser degree the diets of natural bodybuilders provide a fairly good answer to this question. Lots of vegetables, lots of legumes, fermented food products, and moderate consumption of animal products with an emphasis on fish. Eat enough so you don't feel weak, but limit consumption to stay fairly lean at the same time.