Add the dates to a bowl and cover with very hot water. Cover and let sit for 15 minutes. Drain, pat dry, and cut in half, removing the pit.: The softened and warmed water will plump the medjool dates and release some of their sticky sugars, creating a smoother texture when blended. You should notice the dates becoming glossy and tender after sitting, and the aroma will become more caramel like. A common mistake is under soaking, which leaves the dates dry and prevents the crust from binding; if any dates feel firm after the recommended time, let them sit a little longer. Drain and pat the dates dry so excess water does not make the crust too wet.
Spray a 8-inch pie plate with nonstick cooking spray and set aside.: Preparing the pan first ensures the crust will release easily later, and a light coating on the plate also prevents the bottom from clinging. When you press the crust in, you want the surface to glide under the crust edges, not tear them. Over spraying can create slippery patches where the crust will not adhere well, so use a light, even mist.
Add the soaked dates, nuts, and salt to the bowl of a food processor fitted with the blade attachment. Pulse together until the mixture is finely chopped. The mixture should hold together when pressed between your fingers.: Pulse these ingredients until finely chopped so the texture becomes uniformly small and able to stick together. As the mixture comes together you will see a cohesive, slightly tacky mass that holds when pinched. If you over process, the nuts will release too much oil and the mixture will become pasty, so pulse in short bursts and check frequently. Make sure the kosher salt is evenly distributed for balanced flavor.
Transfer the mixture to the prepared pie plate. Lightly spray your hands or the bottom of a flat dry measuring cup with nonstick spray and gently press the crust out to cover the base and the sides of the pie plate.: Pressing the crust into the pan defines the structure of the pie, so focus on evenness and thickness across the base and sides. Lightly spray your hands or the bottom of a flat dry measuring cup with nonstick cooking spray and gently press the crust out to cover the base and the sides of the pie plate. You want a compact, level surface without holes. A common error is packing too loosely which causes crumbs to fall away when slicing; press firmly but not so hard that the crust becomes overly dense.
In a medium bowl, mix together the yogurt, vanilla bean paste, orange zest, and honey. Spoon the mixture into the pie plate and smooth into an even layer.: The filling blends quickly, and you should notice a fragrant lift from the orange zest and vanilla bean paste as you stir. The texture should be creamy and thick; if the whole milk greek yogurt seems thin, let it drain briefly in a strainer for a firmer finish. Over mixing introduces air which can make the filling settle oddly, so combine until smooth and uniform.
Arrange the fruit in your desired pattern. Loosely cover with plastic wrap and refrigerate for 1 hour before serving.: Use an offset spatula or the back of a spoon to level the filling so it meets the crust edges cleanly. You want a flat, even surface for the berries to sit on. Work quickly but gently so the filling does not become grainy from over handling. If the filling is too loose, chill the pie briefly before arranging fruit to prevent sliding.
Slice into wedges and use a small offset spatula to remove the slices.: Place the mixed berries on top in a pattern that pleases you, whether casual or precise. The bright colors will create contrast against the creamy white filling. Pat the berries lightly so they sit snugly, and avoid stacking too high which can cause them to slip off when slicing. If using very juicy berries, consider patting them dry first to prevent extra moisture pooling on the surface.
Loosely cover with plastic wrap and refrigerate for 1 hour before serving: Chilling firms the filling and helps the crust set so slices hold their shape. You will feel the pie go from squishy to pleasantly set, and the flavors will meld in the cold environment. A mistake some people make is refrigerating for too long without protection, which can pick up other fridge odors; keep it loosely covered to allow a slight exchange while preventing a film from forming.
Slice into wedges and use a small offset spatula to remove the slices: For clean slices, run a clean, warm knife between cuts and wipe it dry after each pass. The contrast you want is a neat edge where the creamy filling meets the compact crust and the berries sit on top. If the pie is too cold, let it sit five minutes to soften slightly for easier cutting. Avoid tearing the crust by using a steady lift with an offset spatula under each wedge.