Pumpkin, Apple and Caramelized Onion Vegan Quesadilla

onions ((I used 1 sweet white onion and 1 red onion), sliced thin)

vegetable broth ((plus more as needed))

balsamic vinegar

pure pumpkin puree

pure maple syrup

chili powder

smoked paprika

crushed dried rosemary

cayenne ((optional for heat))

apple ((sliced thin))

medium tortillas ((gluten free, if desired))