When early European explorers arrived in Canada suffering from scurvy, the Indians showed them how to use pine needles for a rapid cure. I want to plant some Arbor Vitae (tree of life) shrubs at my country place for survival medicine.
I have seen instructions from our Great Depression saying one can use powdered grass mixed with flour for bread and baking. I don’t remember the exact figure, but it was somewhere between 10 and 25%. Lambs quarters (plant) and sorel (somewhat lemony flavor) are 2 plants I have used in salad or to cook.
Given that our hominid ancestors were not fuss budgets, I imagine they enjoyed the grain and grass, partially digested, contents of animal stomachs and intestines. Thus plenty of time for larger molars to evolve. In early phases they might have been eatinb the entire contents of rabbits, and other small mammals. As they became larger and more skilled they would have been killing larger animals like antelope, pigs, and eventually bovines and mammoths, still eating digestive contents.
Good call!