As the sugar melts, the syrup will thicken, turning a rich caramelly brown color, approximately 3-4 minutes (keep a close eye, as this will burn quickly).
Transfer the candied pecans to the prepared sheet pan. Using the spatula, spread into a single layer so that the nuts are not sticking together in one big clump.
Once the candied pecans have cooled for a few minutes (about 5) and the sugar coating has completely hardened, you can break them apart with your fingers.