First, coarsely grind nuts and oats in a food processor. Then add the remaining ingredients and let them form into a sticky dough. Line a springform pan with parchment paper, press the dough inside and leave a small edge. Bake in the preheated oven at 180 degrees for 15 minutes.
Blend the ingredients for the filling in a blender until creamy. Pour onto the finished nut base and bake at 170 degrees for 30-35 minutes. Allow to cool slightly and then refrigerate for at least 3 hours.