[l2ridehd]

When you sat "different every time", could you elaborate a bit more? Is it problems with the crust, to sweet, to tart, not cooked through, what kind of problems are you having?

Blueberries tend to be sweeter then many fruits and a common mistake is adding to much sugar. I always eat a few berries before adding sugar and adjust as needed. Most recipes call for a cup of sugar but this is usually to much, especially if the berries are sweet. Also because of the density of the filling, less air space then an apple pie, it takes a hotter oven to cook the bottom crust. I use 425 for about 45 minutes. This will also cause you to burn the top crust, so I always use an egg wash and cover the edges with foil after 15 or 20 minutes. I use cornstarch or flower to thicken and pat with about two tbls of butter and juice from one medium lemon before adding the top crust. Always add a bit of cinnamon and nutmeg as well.

I have also used the method of a single crust as jblum suggests and they are also very good, just not like mamma used to make.