Toss first four ingredients together in a mixing bowl. Spread mixture, in a single layer, on a large rimmed baking sheet. Slather with balsamic vinegar.
Roast in hot oven for 10 to 15 minutes, until kale begins to crisp. Remove from oven and serve immediately.
Notes
For best results, avoid these common mistakes when roasting kale:
Don't overcrowd the baking sheet
Thoroughly dry the leaves (pat dry with a paper towel)
Don't use too much olive oil (less is more for optimal crispiness)
Remove the stems before roasting kale
Midway through the roasting process, toss and rearrange the mixture on the baking sheet.Serve roasted kale as a snack, garnish, or delicious warm side dish or salad.