Prep the pan. Lightly grease a 9-inch pie dish or springform pan.
Line the bottom with parchment if using a springform.
Make the crust. In a food processor, pulse oats until they’re sandy with some texture. Add almond flour, cinnamon, and salt. Pulse to combine.
Pour in melted coconut oil and maple syrup, then pulse until the mixture clumps when pressed. If dry, add 1 teaspoon water at a time.
Press and chill. Firmly press the crust into the pan and up the sides. Use the bottom of a measuring cup for an even layer.
Chill in the fridge while you make the filling.
Blend the filling. In a large bowl, beat softened cream cheese until smooth. Add peanut butter, Greek yogurt, vanilla, salt, and 1/3 cup sweetener. Beat until creamy and fully combined, scraping the bowl as needed.
Taste and add more sweetener if you prefer.
Fill the crust. Spoon the filling into the chilled crust and smooth the top with a spatula.
Chill to set. Cover and refrigerate for at least 4 hours, or overnight for the cleanest slices.
Garnish and serve. Top with dark chocolate, chopped peanuts, or a quick drizzle just before slicing. Use a warm knife for neat cuts.