From its no-fuss piecrust that comes together quickly in a food processor to its perfectly balanced filling, this straightforward and stress-free pie is perfect for all your warm-weather picnics and parties. A swift stash in the freezer helps eliminates a soggy bottom crust, and it will help the dough shrink less when baked so it holds its shape in the oven. The crust bakes to golden brown perfection and is sturdy enough to hold the gorgeous, glossy blueberry filling. All it needs is a dollop of tangy whipped mascarpone cream.