You could use other flatbreads here, such as naan and tortillas. Apples, instead of pears, are good, too.

1 T extra-virgin olive oil
1 large (sweet) onion, sliced
1 – 2 medium ripe pear(s), sliced
2 T balsamic vinegar
1/2 t  ground black pepper
4 – 6 whole wheat pitas
1/2 c crumbled blue cheese; or feta; or goat cheese
1/4 c chopped walnuts

1. Preheat oven to 450°F.

2. Heat oil in a skillet over medium heat. Add onion and cook, stirring often, until soft and golden, about 7 minutes. Stir in pear and cook, stirring often, but gently, until slightly soft and heated through, a couple of minutes. Add vinegar and pepper and continue cooking, stirring often, until the liquid has evaporated and the onion is tender and coated with a dark glaze, about 2 minutes more.

3. Divide the onion-pear mixture among the pitas; sprinkle with cheese and walnuts. Transfer the pitas to a large baking sheet and bake until heated through and the cheese is melted, about 5 to 10 minutes.