Wash the beets and cut the tops and root tips off of the beets. Wrap in foil and place on baking sheet. Bake for 50 minutes. A knife should be able to pass through easily when cooked. Let cool before handling.
Making the dressing
While the beets are cooking using a whisk mix the honey, salt, pepper, and mustard until smooth. Add the balsamic vinegar and whisk until smooth. Finally add the oil and whisk until smooth and silky. Set aside.
Making the candied walnuts
Reduce oven temp to 350°F or gas mark 4.
Combine the melted sugar, cinnamon, salt, and brown sugar. Toss the walnuts in the sugar mixture until coated. Spread on a sheet pan lined with foil and bake for 5 min.
Assemble the salad
Using a paper towel lightly scrub the beets and the skin will come off. Slice the the beets and set aside.
Core and slice the apple and set aside.
Add the arugula, apples, and beets to the bowl. Toss with some of the balsamic vinaigrette and top with the candied walnuts and goat cheese.