What I meant is that what your "favorite" food/dish is is influenced by a huge number of factors outside your control, for example an Italian may like olives mu

What I meant is that what your "favorite" food/dish is is influenced by a huge number of factors outside your control, for example an Italian may like olives much more than a Russian might, simply because of where (climate & geography) olives grow. For meats, I don't think there's that much of variation as grains/vegetables as it appears that the "main" meats (poultry, fish, pork, beef) are relatively common globally. But there have been several "uncommon" grains that were popular but were pushed down as governments pushed for specific crops to meet short term food security. For example India pushed for high-yielding varieties of wheat and rice in the green revolution, while some other grains (buckwheat iirc) have been around for a long time but have fallen out of favour (due to cost, I would guess).