Rinse the fresh blueberries under cold running water and let them drain well. Have two bowls ready on the counter and place the remaining ingredients within easy reach for quick preparation.
Divide the full-fat quark evenly between the two bowls. Add the blueberries and hemp seeds to the quark. Stir everything together with a spoon until the berries and seeds are evenly distributed throughout the quark.
Sprinkle the teaspoon of cinnamon evenly over the contents of both bowls. Finish the portions by sprinkling a small pinch of Celtic sea salt over the top of the quark.
Serve the quark immediately after preparation. The dish is ready to eat cold right away as a hearty breakfast or snack.