Things like tomato sauce and pasta in italian cuisine wasn't until almost 1800. Yet we talk about 'authentic' cuisine we usually use it in context way before 'America'. Yet most cuisine we eat didn't come into existence until AFTER America.
Another example is chilis in thai cuisine. Capsicum didn't make it over the ocean until america was discovered. So all the spicy peppers in so many dishes from Thai to Vietnamese food didn't exist in their cooking until it was brought over and eventually incorporated.
Potatoes is another one. Originated in Peru. Russian potato vodka? Irish Potatoes? Germans bangers and mash?
Nope, nada until America was discovered.
Chocolate, Vanilla. Staples of desserts of european cooking...except not until America was discovered.
These above ingredients alone are associated with so many traditional recipes but they didn't exist until recently. It really shows how quickly food and traditions change and the idea of 'authenticity' is over blown.