Pastiche is a French word derived from an Italian one that means pie crust, according to Dictionary.com. So a pastiche is like a pie, in which a variety of ingredients are combined to create a single dishes in which the individual elements are still recognizable.
|May I interest you in some pastiche pie?|
|How about some pasta pastry?|
A pasty is a sophomoric giggle-inducing word for meat and vegetables wrapped in a pie crust and folded over to be eaten on the go, also known as a pocket pie. So this is the part where I was going to joke that pasties, the thing you eat, are etymologically unrelated to pasties, the things that women paste over their nipples because somehow obscuring one's nipples makes it legal to be topless in public (man nipples - no problem; lady nipples - filthy). Anyway, I was going to joke that the words are etymologically unrelated, but it turns out they're totally not. Pastie comes from paste, which also comes from pasta.
|Oh yeah, you're looking at pastry pasties. That's happening.|