Looking for good pie crust / Blueberry pie recipe

Hello wonderfull people,

my girlfriend really wants to eat a blueberry pie like the one in tom and jerry. Problem is we are both wheat, rye and spelt intollerant / slightly allergic to different degrees so thats why i'm asking here.

If possible i would love a recipe that has relatively few ingredients and as little specialty ingredients as possible.

Also also because we are based in germany we don't have access to a lot of flourmixes from there.

I know its asking for a lot but if i can at least find a good recipe for the blueberry filling that doesn't end up like a soup ( that was the main problem with my previous attenpt) i would be very gratefull