Preheat the oven to 350 degrees F. Grease a tart shell and set aside.
Add the nuts to the bowl of a food processor. Process on high until chopped and they resemble a coarse sand. Careful not to over-process or you'll end up with nut butter!
To the bowl add the dates and coconut oil and process until a dough begins to form. Add the quinoa flour and oats and pulse until everything is combined.
Dump this mixture into the prepared tart pan and press the dough out until the sides and bottom are evenly covered. Bake for 10 minutes until starting to brown.
While the crust is baking, spiralize the apples. Use whichever blade you'd like - I opted for the smallest one, but the would work with any.
Add the apples to a large mixing bowl, followed by the lemon juice and coconut sugar. Toss with a pair of kitchen tongs until the apples are evenly coated with sugar. Set aside until crust is done.
Pour apples into the hot tart shell and return to oven to bake for another 25 - 30 minutes. Half way through you might want to cover the tart with tinfoil so as to protect the crust from burning.
Remove the tart from the oven and let cool. Cut into triangles and serve with your favorite ice cream!