> repeatedly settled or invaded over thousands of years
The difference with Tex-Mex is that its foundational items are Native American, so the distinction, imo, is that the main ingredients and how they are used is from America. Even though the Americas were populated by pacific islanders/Asians, no one would call Tex-Mex Asian food.
I don't know a lot about the making of Indian food, but I have not yet heard the argument that the base ingredients/spices and how they are used come from the British Isles. That's how I would "draw the line" in determining if it's British or Indian food.
That said, the best Indian food I have had was in London
Indian food uses lots of chilies, peppers, tomatoes, and potatoes—which are all native to the Americas, and were brought to Asia by European traders in the early modern period.
So while I see your point, I wouldn't say a cuisine is always "from" the same place as its ingredients.
The difference with Tex-Mex is that its foundational items are Native American, so the distinction, imo, is that the main ingredients and how they are used is from America. Even though the Americas were populated by pacific islanders/Asians, no one would call Tex-Mex Asian food.
I don't know a lot about the making of Indian food, but I have not yet heard the argument that the base ingredients/spices and how they are used come from the British Isles. That's how I would "draw the line" in determining if it's British or Indian food.
That said, the best Indian food I have had was in London