Combine the cucumbers, tomatoes, scallions, minced dill, vinegar, oil, salt and pepper in a medium bowl. Toss and let sit for 10 minutes.
Divide the hummus between 2 shallow bowls. Make a swirl and a small well in the middle of each dollop of hummus. Divide the tomato and cucumber mixture evenly between the bowls. Add 1/4 cup of the sauerkraut to each bowl and sprinkle with the radish. Sprinkle with sesame seeds and a few dill fronds. Serve with pita bread.