Beef was dried into jerky. Wild game supplemented the diet, mostly deer, turkey, squirrels, rabbits, raccoon, opossum and fowl. Buffalo probably did not figure into the Anglo diet until the middle eighteen hundreds when the frontier moved out to the Llano Estacado. The simplest method of eating corn is just to pull back the husk and take a bite, that is providing it's early in the season and the corn is still tender. Dried corn could be boiled and eaten that way, or it could be ground into meal and made into corn mush or corn cakes or corn bread.
Corn mush is simple food.
Just stir some cornmeal into boiling water and cook it down until it thickens, add some butter, sugar or honey and a little milk, and you have a delicious hot breakfast. Omit the butter, sugar and milk and cut back on the water enough to make a thick batter, and you can fry it into Johnny cakes or bake it on a clean garden implement for hoe cakes. For corn bread, you have to have a leavening agent, like baking powder or baking soda and buttermilk, to make it rise. The Native Texans learned to soak dried corn in lime water to make hominy which can be ground into masa , a type of corn flour, a staple of Tex-Mex cooking. Cornmeal comes in white or yellow.