In a small bowl, whisk together the orange juice, orange zest, lemon juice, lemon zest, blueberry honey, salt and pepper.
Drizzle in the garlic oil while whisking and continue to whisk until the dressing is well blended. Alternatively, combine everything in a jar with a tight-fitting lid and shake to combine.
In a separate bowl, combine Kohlrabi turnips, carrots, beets, orange segments, blueberries, and mint leaves, then toss in dressing.
Add additional salt and pepper to taste.