Preheat oven to 250°F or 120°C. Line two baking trays with parchment paper.Wash and dry the kale leaves well, then remove woody stems and chop leaves into bite-size pieces.
Add to a bowl and toss with olive oil until fully coated. Optionally, you can add some grated garlic or garlic powder.
Place the leaves next to each other on the baking trays on a single layer and with some space between each piece.
Bake in the oven at 250°F or 120°C for about 25 to 30 minutes. Take out of the oven and let cool down for 5 minutes. The chips will get crispier as they cool.
Arrange on a serving platter and sprinkle with seasalt, red pepperflakes, and grated lemonzest.