If by common knowledge, you mean that a significant portion of the population believes it, I'm not sure how reliable that evidence that is. People will believe a whole lot of strange stuff.
On topic, even the first paragraph of the Wikipedia page states that it was "popularized by cooks from India living in Great Britain". Regardless of where it was first created, this is clearly the product of Indian immigrants. I don't believe their heritage should be ignored just because they moved. Although, I don't want it to sound like I believe in a 100% black and white distinction here. It's clearly a fusion dish with British influences. The original chicken tikka was a lot dryer and the "masala" sauce was added to make the dish creamier to appeal to British tastes.
However, I don't go around claiming General Tso's chicken isn't Chinese food, just because it was first made in New York; or that the chimichanga isn't Mexican food, just because it was originally made in Arizona; or that a Cuban sandwich isn't Cuban, just because it was first made in Florida. These dishes wouldn't exist without the immigrants who modified their cultural recipes to adapt to a new environment.
To me, chicken tikka malala is an Indian dish with British influences.
That being said, the only UK foods I've had were made by expats here in the states. None of it was bland, with the exception of breakfast beans, "because they're meant to be mild to start your day" as I was told by a lovely liverpudlian.
She would do fish and chips, and the batter was well seasoned. Not heavily seasoned, but some pepper, a little paprika, and a bit of onion powder to give it some aromatic kick. Well balanced, and imo, as good as any of the southern fried fish recipes I've had.
The chips were obviously just salted and vinegar used per person.
But when we did pot luck at work, she would bring in what she called "good english food", which included some curry a few times.
But her shepherd's pie? Holy hell, that was some great stuff. She said it was really cottage pie because it was beef usually. But it had the usual pepper, onion, garlic, and herbs.
And the other expats I ate with were similar. Maybe different amounts of a given herb or spice, but it was in there.
I think the UK food thing is a meme in itself, and likely arose the way things usually do, with the majority of cooks just being bad cooks, rather than representative of a cuisine or the way things are done properly in that country.
The reputation comes from the US military being stationed in the UK during the height of WW2 rationing when there was an extremely limited list of ingredients to cook with. They were unable to associate a country under an attempted siege from U-boats with a reduced supply of food.
We do have a love of beige food at times, but it's essentially our version of chicken tendies.
Boomers made that bland war time food linger. They were children during and just after WW2 so it was part of their childhood nostalgia and they fed it to their own kids. Also we've had Indian/ Chinese restaurants in the UK for a while but they were mostly just in major cities at first so the average person still had little exposure to foreign or exotic food until the late 1970s/ early 1980s.
Yank here. Most of us were raised on American Exceptionalism which has been pounded into our head since birth, for a few generations. There's no point arguing this, because murica...
You never sang "Yankee Doodle," or "Yankee Doodle Dandy" on July 4, even as a kid? I'm southern as can be and these were staples on the Fourth, Memorial and Labor Days, as well as bright red hotdogs, chips (crisps), soda and Budweiser and PBR.
You are clearly making a poor joke, but... Butter is literally what the French are known for. Sugarcane is from the South Pacific and sugar itself originated in India.
Southern and Creole cuisine originated in America however, and that uses a ton of spices on par with native Indian cuisine.
Industrial use of high fructose corn sirup is all American Capitalism, though.
... And southern france hardly uses butter btw.
sugar itself originated in India
Lol, what? Also: it's not about where the stuff came from but rather what the cuisine does with it. Italian or German cuisine doesn't become south american all of a sudden cause of tomatoes and potatoes.
Butter was a luxury prior to 150 years ago limited to a hard 20 mile radius of milk farms. 10 if you wanted it to taste good. Refrigeration changed this.
Sugar was similarly limited due to either trade with the far east or the establishment of colonies in the west indies. Russia didn't have a sugar source until sugar beets in the late 1850s.
Most regional European cuisines were developed in the 1700s with the introduction of Tomatoes and Potatoes from the Americas. Both of the spices called out were still luxuries at the time.
