Yes, the cheeseburger was invented in California! The meat version in the 20s in Pasadena by Lionel Sternberger at his restaurant Rite Spot. McDonald’s came around in San Bernardino with the fast food version. In ‘N Out brought the drive-thru version in Baldwin Park. And, Impossible in Redwood City brought us the vegan version (there were other prior vegan creations, but they were often confused with cardboard).
California owns the burger.