Heat oven to lowest temperature, generally 150℉-180℉/66℃ - 82℃.
Line sheet pan with parchment paper. Set aside.
Combine all ingredients in a medium saucepan.
Cook over medium/medium-low heat, stirring as needed to prevent burning until thick and jammy, about 20-25 minutes.
Cool slightly, about 10 minutes.
Pour into blender.
Purée.
Pour onto prepared pan.
Use an offset spatula to spread evenly and thinly (about 1/16-inch).
Bake for 4-8 hours, checking it every 30 minutes after 4 hours, until no longer sticky.
Use a pizza cutter or scissors to cut into strips.