Prep your pan. Lightly grease a 9-inch pie dish with a dab of coconut oil or nonstick spray.
Set aside.
Make the crust. In a food processor, pulse the oats and nuts into a coarse meal. Add cocoa powder, salt, vanilla, maple syrup, and melted coconut oil. Pulse until the mixture clumps when pressed.
If too dry, add 1–2 teaspoons water.
Press and chill. Firmly press the crust into the pie dish, going up the sides. Aim for an even layer. Chill in the fridge while you make the filling.
For a firmer, toastier crust, you can bake it at 350°F (175°C) for 10 minutes, then cool completely.
Blend the base. In a high-speed blender or food processor, add silken tofu (or blended cottage cheese) and Greek yogurt. Blend until very smooth and creamy. Scrape down the sides.
Add the dry ingredients. Add cocoa powder, protein powder, salt, and vanilla.
Blend again. If it’s too thick to move, add 2 tablespoons milk to help it along.
Sweeten and add chocolate. Pour in the melted dark chocolate and 1/3 cup sweetener. Blend until silky.
Taste and adjust sweetness. If you want a lighter texture, add another tablespoon or two of milk and blend briefly.
Fill the crust. Spoon the filling into the chilled crust and smooth the top with a spatula. Tap the pie dish gently on the counter to release air bubbles.
Chill to set. Cover and refrigerate for at least 3–4 hours, or overnight for the cleanest slices.
The filling firms up as it chills.
Garnish and serve. Top with a small dollop of Greek yogurt, berries, or chocolate shavings. Slice with a warm, dry knife for neat edges.