When I lived in Seattle there was a small bakery that made these and I've looked for the recipe for years. Every recipe I've tried never seemed quite right, til this one, this is it. Thank you for sharing. And ending my search.
I wouldn't say this was a very good dish but it could be, with a few extra ingredients :) The egg was too bland to be a tart and the pastry was too savory. Also I found that I needed quite a bit more than 5 tablespoons of hot water. This recipe has a lot of potential to be really good.