Set sous vide machine to 85C/185F.
Add beets, olive oil and a pinch of salt in sous vide bag and remove air through a vacuum sealer or the displacement method. Drop the bag in the bath for 2 and a half hours.
Remove bag from bath and transfer to an ice bath for 10 minutes. Once chilled, remove beets from bag and place on a paper lined plate. Pat the beets dry using paper towel and slice them into bite size pieces.
In a small bowl, whisk together orange juice, lemon juice, white balsamic vinegar and salt and pepper to taste. Add beets and toss in balsamic citrus dressing. Garnish with fresh chopped chives and enjoy!