With chip bag still sealed, crush chips inside bag with hands.
Pour chips into large foil-lined baking tray.
Split almond bark in half.
In large microwavable bowl, microwave half of the bark for about 30 seconds.
Stir as best you can and place back in microwave for another 20 seconds.
Stir again. If mixture is not yet to an even pouring consistency, heat in microwave for another 15 seconds. Continue to do this at 15-second increments until the bark is evenly melted.
Drizzle melted bark over chips in long even lines.
Place second half of bark in microwave and repeat heating steps.
While second bark half is heating, pour chopped pecans over chips. (Optional)
When the last of the bark is melted, drizzle it over the chips and pecans.
With a spatula or large mixing spoon, carefully stir the chip mixture. spreading the bark as evenly as possible. Flatten mixture back out into pan.
Allow potato chips to set for at least an hour until the bark has firmed up on the chips and is no longer gooey to the touch. Break mixture into jagged bite-sized pieces.
Serve after chips are set or store in air-tight container for 1-2 days.