Rinse the half organic apple and remove the core. Cut the apple with the skin still on into small, even cubes. Place the unsalted almonds on a cutting board and chop them with a chef's knife into coarse pieces.
Scoop the authentic Greek yogurt into a large bowl. Add the apple cubes and chopped almonds to the yogurt. Gently stir until the apple and nuts are well distributed.
Finish the dish by sprinkling a generous pinch of Ceylon cinnamon over the top. Distribute the spice evenly over the yogurt's surface.
Serve the generously filled bowl immediately. Eat the dish right away so the apple pieces and almonds retain their crispy texture in the thick yogurt.