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I was thinking about pizza (specifically, the way it is made in America, but pizza in general) and how it has become such a hugely popular food around the world.
Although there were sorts of proto-pizzas thousands of years ago, making "real" pizza would not really have been possible until the introduction of the tomato around 500 years ago. But I can see no reason that, if the tomato were around, modern-style pizza could not be made.
And I think it would have enjoyed wide success.
There is a manga called Jin that has been published where a Japanese doctor goes back in time to the 1800's. In this manga, he helps popularize donuts