> but a lot of European cuisines have dumplings.

Those were brought to them most likely by China in one way or another.

> Yes, a filled pasta is a very different thing from dumpling,

You saying it like a filled pasta and a dumpling isn't the same twist on "filling encased in thin dough".

> There is nothing in South Asian cuisine similar to sashimi or to soy heavy stir fries.

Dish is ingredients and method. Stir-frying is a Chinese technique (technically multiples, but all originated in China). Ingredients get replaces all the time for various reasons. You're telling me Poriyal is not close relative to the OG stir-fry?