* Preheat oven to 350 degrees, F.* Wash and peel beets.* Slice beets as thinly as possible, using a mandolin slicer if you have one.* Place beet slices in large mixing bowl and evenly distribute olive oil and then gently toss.* Using two rimmed baking sheets, evenly distribute beet slices in single layer.* Stack baking sheets on an oven rack.* Bake until edges start to dry out, about 20 minutes and then rotate baking sheets.* Continue to bake another 15 to 20 minutes and remove beets slices become light in color.* Allow to cool on wire rack where beet chips will begin to crisp as they cool.
Notes
Slice the beets as thin as possible for crispy chips.
When the beet chips are finished roasting, leave them on the baking sheet until they are cool. This will help make them crispy.
Use two baking sheets for the beet chips. Place one baking sheet on the center rack, and one on the bottom rack. Rotate their position in the oven midway through the roasting process.