Wild spearmint. Crush a leaf to identify by the strong mint smell. Add fresh leaves and flowers to a salad, or to make tea. (Can also use dried leaves and flowers for tea.)
Freshwater mussels. I like to harvest them on a sandy bottom near shoreline in waist-deep water where I can bend down and pick them without having to swim. Remove the meat from within the shell with a knife and rinse in water. Boil for a few minutes in a change of water. Lightly pan fry seasoned with cornmeal and Montreal Steak Spice. They are a bit chewy, but a decent protein-rich meal. The waters here are pure and uncontaminated; I drink the water straight from the lake or river.