- Preheat the oven broiler to medium. 
- Prep the ingredients per instructions above. 
- For the glaze, place all ingredients in a saucepan over medium heat, stirring until sugar dissolves. Bring to the boil and cook for 2-3 minutes until slightly reduced. Pour glaze into a bowl and toss with corned beef. 
- Combine the sauerkraut, onion, and dill in a bowl. In a separate bowl combine the mustard, mayonnaise, and honey. Set aside. 
- Place bagels, cut side up, on a baking tray. Divide cheese among bases of the bagels. Broil for 3-4 minutes until bagels are golden and cheese is melted and bubbling. 
- To assemble, spoon the mustard mayo over cheese, top with corned beef and sauerkraut mixture, and finish with glazed bun lid. 
- Serve reuben bagels with sliced apples, nut butter, and iced tea.