Preheat the oven to 375 degrees F (190 degrees C). Coat a baking sheet with Nonstick Cooking Spray (to taste).
Slice the Beet (2 pound) as thin and evenly as possible. You can use a mandolin or a very sharp knife. The slices should be thin enough that they curl slightly at the edges.
Put the beet slices in a large bowl and drizzle them with Olive Oil (1 tablespoon), Dried Rosemary (2 teaspoon), Salt (1/2 teaspoon) and Freshly Ground Black Pepper (1/8 teaspoon). Using your hands or tongs, toss until evenly until coated.
Place the beets in a single layer on the baking sheet. Bake until crispy, about 17 to 20 minutes depending on oven strength.
Let cool for a few minutes then serve alone or with dipping sauce of choice.