Preheat the oven to 180 degrees Celsius.
Remove the core from the apple and cut the apple into small cubes (approx ½ cm).
Sprinkle a little lemon juice over the apple to prevent discolouring.
Combine the cinnamon, walnuts and honey into the apples.
Cut the mountain bread into quarters. Brush each piece with a little apple concentrate.
Brush the bottom and sides of a muffin tray with olive oil and press a piece of mountain bread into each divide. Line the bottom with another small piece of mountain bread to make the base stronger.
Fill each cup with the apple and walnut mix and bake in the oven for 15 minutes.
Note: Apple concentrate is available from health food stores or some supermarkets.
Makes 6 servings (serve = 1 cup)