Preheat the oven to 350ºF.
Grease a 9" pie dish with fat of your choice (I used leftover melted butter from the crust).
Combine the crust ingredients with a fork (don't forget to save your yolk!), then spread into the pie dish. Press the crust up on the sides enough to hold in the filling.
Bake for 6 minutes, then remove from the oven.
While the crust bakes, combine the filling ingredients in a large bowl, whisking until smooth.
*Place the berries in a small bowl, heat for 30 seconds, and smash with a fork.
Pour the filling over the crust, top with berries, and use a knife or small spoon to swirl over the top.
Bake the pie for 20-25 minutes, or until the filling is "set" (jiggles just slightly when the dish is shook).
Allow the pie to cool completely, transferring into the refrigerator once it reaches room temperature.
Once chilled, slice & serve!