Cut endive into four sections and discard any limp parts.
Rinse the endive thoroughly but gently. Dry the endive leaves using a salad spinner if possible. Or place the leaves in a single layer on a cloth napkin or towel and cover to get all water droplets off.
When all the leaves are coated, place a wire baking rack in a baking sheet. Then make one layer of the leaves, none touching. Roast in batches if you need to.
Bake in the preheated oven for 15 minutes. Keep an eye on it to prevent burning and adjust time as needed.
Endive chips are done when they are a nice deep brown. Be sure not to burn.