15 to 20 minutes.
sprinkle with lemon zest and hot pepper flakes; toss gently and let cool on baking sheets.
baking tip: watch closely toward end of bake time and remove from oven when almost crisp – “chips” will crisp even more as they cool. but if any are still a bit soft after being out of the oven for more than 10 minutes, return them to the oven and continue baking for a few minutes longer. 