Coriander and blueberries are a surprisingly fabulous pairing. As Niki Segnit explains in The Flavor Thesaurus, coriander seeds and blueberries have a lot in common, flavor-wise: coriander seeds contain a compound, linalool, that is used to create artificial blueberry flavor. And the combination of Greek yogurt and coriander is also not as odd as it might seem: Coriander is native to southern Europe and has been cultivated in Greece since at least the second millennium BC.
Other than the graham cracker crust, this pie requires no baking. It does need to chill at least 6 hours.