When the Europeans arrived in America they assumed the foods that were available back home would be available here. The biggest disappointment was that there was no wheat to make bread. The Native American's showed them how to make bread from corn. Other new foods they had not seen before were the turkeys and pumpkin. Soon some European foods arrived; they found that wheat didn't do well along the Atlantic seaboard. Soon they planted trees, imported livestock, and vegetable seeds.
Once the pioneers moved west and south they brought their recipes and combined them into native foods that included corn, berries, wild game, including deer, squirrel, and grouse, tomatoes, and lots more. Also, the many cultures were able to combine their recipes with the new foods and created all new recipes. At the same time people from the orient arrived in the west, but that is another story.