Slice your fruit into 1/4″ slices and carefully remove the seeds. Use a wide blade knife to ensure uniform thickness of individual slices.
Arrange the fruit slices onto a baking sheet lined with parchment paper and place in a warm oven set to about 150-170°F.
Bake for 3-4 hours, flipping every hour until the fruit is dried (but not completely shriveled up).You want the slices to retain their color and not look brown around the edges.
Pierce the dried fruit slices with ornament hangers. That’s it! Now you have pretty ornaments for your tree. These would also make a great gift.
Notes
I also tried a technique of air drying the citrus slices and was surprised at how quickly they dried out.It took about four days for them to get to a nice stiffness, though the orange slices curled up rather than staying flat as they did after baking them. The lemon and lime slices didn’t curl.