Earthy beets are a great combination with bright oranges and rich goat cheese. It is rounded out with some sweet balsamic vinegar and woody toasted walnut. Beets stain so be sure to cover your cutting board with parchment paper or plastic wrap. I also wear plastic gloves to save my hands from turning red.
Preheat the water bath to 183°F (83.9°C).
Peel the beets and cut them into bite-sized chunks. Zest the orange over the beets then salt and pepper them. Place the beets in a sous vide bag, trying to keep the thickness of the bag less than 1" (25mm) for even cooking. Seal the bag and cook for 60 to 90 minutes, until heated through and tender.
Remove the beets from the bag and toss with the tarragon, orange zest, shallot, and arugula. Top with some goat cheese and walnuts then drizzle with the balsamic vinegar and serve.