Yes, it's possible, and it's delicious too! 

Every time I make this dessert it is literally devoured, with delight, by everyone at the table.

Ingredients:

• 2 cups walnuts (toasted & cooled) 
• 1 cup dates (pitted) 
• 3 - 4 apples, peeled & cored 
• juice from 1 lemon in 2 cups of water 
• 1/4 tsp cinnamon (ground) 
• 1/8 tsp allspice (ground) 
• 1/2 cup apple juice 
  Note, choose one that's freshly squeezed and/or has no added sugars.

Directions:

1. Toast the walnuts & allow them to cool while you prep all the other ingredients
2. Grease a 9-inch tart pan with coconut oil or line with parchment paper
3. Peel & core the apples, and then slice them into quarters, and again into 1/4 inch thick slices (see photo for reference).  Then place them in the lemon water while you finish prepping the remainder of the apples
4. Once the walnuts have cooled, combine them with the dates in a food processor.  Process them until well mixed and ground, but not completely smooth.  It should create a coarse texture when done.  Then press the mixture into your tart pan, pressing it down (with a potato masher) to create a flat surface/base...then place it into the fridge while you make the filling (i.e., cook the apples).
5. Drain the apples from the lemon water, and place them into a large skillet with the rest of the ingredients and cook for ~10 minutes, stirring frequently on medium heat.
6. Remove apples from the skillet (once they're cooked) and allow them to cool completely.
7. Reduce the remaining liquid to about 1/2 the original volume and cool that separately 
8. Spread the apples evenly over the walnut & date crust.  Brush the syrup you've created with the reduced liquid over the apples
9. Serve right away or keep in the fridge until your guests are ready
10. Keep the tart covered in the fridge so it doesn't pick up moisture.
11. Enjoy with a little plant based ice-cream (e.g., Nada Moo coconut ice-cream) or plant based yogurt (e.g., CocoJune)