For us it is a simple food. For Indians - something like chicken-tika-masala is a simple food. For Vietnamese - pho bo and bun bo nam bo are simple. For Czech - gulas and kulajda is a simple food:) Japanese sushi - really simple food:) as an pizza or pasta for Italian. Its not the question of complexity :)
It's more about how rich the taste is. Russian food isn't even close in that regard to pho bo or pasta