Bring a medium pot of water to boil on high heat. Add beets to boiling water and reduce heat to simmer for 8 to 10 minutes or until beets are tender enough to pierce easily with a fork.
While the water is boiling, prepare a large bowl filled with cold water and a cup of ice. When the beets are done, strain and immerse in the cold ice water to stop cooking. Drain beets and set aside.
Meanwhile, slice celery and red onions in thin slices. Tear cilantro and parsley leaves from stems. Make dressing - add all the ingredients together in a small bowl and stir vigorously until combined.
Once the beets are cooked and everything is chopped, add the beets, celery, parsley, cilantro, red onions, and radishes and dressing. Stir gently to combine.
Top with goat cheese, pumpkin seeds and additional sumac and fresh ground pepper before serving.