Preheat the oven to 325ºF
Meanwhile, prepare the kale. Remove the leaves from the center ribs. Tear the leaves into pieces, and compost the ribs.
Place the leaves on a rimmed sheet pan. Drizzle some olive oil, no more than 1 to 2 teaspoons, and season with salt. Rub the leaves together to coat them completely.
Bake for 15 to 20 minutes until crisp, making sure to stir them in the pan every 5 minutes. Let cool completely before storing in an airtight container.