Preheat oven to 400°F. Pulse the pecans in a food processor, just until crumbly. Stir in the rest of the crust ingredients and press (using hands dusted with superfine brown rice flour) into an 8-inch springform pan.
Bake for 10 minutes and then remove from the oven.
For the Filling
Place all the ingredients for the filling into a food processor and blend until very smooth, for at least 5 minutes. Spread onto the prepared crust and bake in preheated oven for 15 minutes.