Yah, until last week, I didn't know about the existence of pumpkin butter, either - enter Trader Joe's
. I guess it's like a jam or maybe (in consistency) like a lemon curd. You find it with the jams and preserves. Ingredient list says "pumpkin, sugar, honey, lemon juice concentrate, spices.
Here's what
Chowhound has to say about it.
As for Greek yogurt - you're originally a fellow European if I remember correctly? So it's basically like the style of plain yogurt you would get in Germany or France or, as it were, Greece
. A bit more creamy than the regular stuff over here, a bit more tart, some brands like Fage even veer towards sour cream territory, which I don't care for that much. I favor the Trader Joe's European style or Greek style, but of course that does you little good in Canada...
ETA: Another brand that is pretty similar is Wallaby, which I absolutely adore but can only afford when it's on sale. Yet another brand I remember seeing in stores is Oikos, but I've never bought it.