In a food processor, add the oats, dates, and salt for the crust. Puree until fine and crumbly. Then add the almond butter and puree for about a minute. Add the milk and pulse through until the mixture becomes sticky (it should hold together when pressed/pinched). If it's not holding together, add a little more milk, 1 tsp at a time, until it does. You shouldn't need more than another 3-4 tsp.
Remove and transfer to prepared pie plate. Press mixture in with your fingers until evenly distributed on the base and a little up the sides of the plate (not fully up the sides to prevent burning of the crust).
In a blender (high speed works best, for regular blender you will need to blend longer and scrape down jar several times) combine all ingredients for the filling. Purée until very smooth, scraping down sides of bowl as needed.
Pour mixture into pie crust (scrape out bowl) and gently tip back and forth to distribute evenly. (Optional: cover rim of pie plate with aluminum foil to prevent overbrowning of any edges of the crust.)
Bake for 10 minutes, then reduce heat to 350F (180C) and continue to bake for 25 minutes, until the pie is golden and has mostly set (the center may be soft, but it will set further as it cools).
Remove from oven, transfer to a cooling rack. Let cool completely before slicing and serving (can refrigerate to chill first).