So first things first, I'm trying to put together a grounded cretaceous Western setting for a personal world building project. I'm aware of just how... Limited humans would be when it comes to diet options in this place in time. However I've already managed to find at least a few items that people desperate for something other than dino meat and fish would try to forage or even cultivate, and I can explain my reasoning for some of them. I could just handwaved a lot of this, but I like the challenge of finding any possible nutrition source from this time period. I'd love to know if there's anything I'm missing or to be corrected if I've gotten some things wrong, and if there are any other plants that humans might be able to eat
Pine nuts, Ginkgo nuts (potentially toxic, but the human body can tolerate it so long as you cook them and only eat a handful), Fiddleheads, Seaweed (older than dinosaurs, and nothing I've read suggests it shouldn't be safe to eat), Sago and Heart of Palm (there are a lot of palms that are very toxic, but palm plants were prominent in the cretaceous and these two foods are regularly harvested and eaten in Southeast Asia from certain palm plants. I think it would be a somewhat plausible contrivance that at least some of Palms had parts fit for human consumption similar to these)
Is this somewhat plausible? Am I completely wrong? Are there some I've overlooked?