Crush grahams in food processor with butter, press into pie plate.
Heat 1 1/4 cup coconut milk to boiling. I would add 1/4 cup sugar at this point, and stir to dissolve. But you can do without it. In a bowl, which three whole eggs. Slowly pour the hot coconut milk in in a thin stream, whisking all the while. Then return all to pan under low heat. Add in 7 oz bittersweet chocolate and 1 tsp vanilla extract. Stir until chocolate is melted, pour into pie shell, refrigerate!