Heat oven to 375°.
Toss kale leaves in olive oil and spread in a single layer on a large sheet pan. Season with pepper.
Roast 10 to 13 minutes, or until crisp, turning over halfway through. Remove from oven and sprinkle with salt and more pepper.
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.