In what country were chicken tikka masala and onion bhaji both created and first served?

This question makes no sense, but i assume you mean where did it originate?

Its actually a british dish!

the legend goes that in a curryhouse in Glasgow in the 70's one particular patron was unhappy with the dryness of the food, he complained and had it sent back to add a sauce.

The bewildered chef made a basic curry gravy and added cream, chickent tikka masala was born!

Strangely enough its even made its way back to India now, and is served over there.