Line baking sheet with aluminum foil (you need enough foil to wrap over beets and create a packet). Coat beets in coconut oil and wrap beets to form a packet. Bake for 45-55 minutes until soft throughout. Allow beets to cool for 15 minutes and peel skin.
While beets are cooling, add goat cheese, honey and thyme leaves to a small bowl and mix with a fork until combined. Set aside cheese mixture until you are ready to assemble the sandwiches.
After beets have cooled slightly, slice into 1/4 inch thick slices and add to a medium bowl. Mix in half of the balsamic dressing. The warm beets will absorb the dressing.
To assemble the sandwiches, slice buns in half lengthwise. Spread goat cheese mixture on bottom of bun, stack roasted beets, onions and arugula on top. Drizzle with the remaining balsamic dressing, add top and serve!
Serve with sliced apples and a simple salad with greens and fresh lemon juice,