Roast pears for 20-25 minutes, until brown and tender. My pears were not ripe so the cooking time ran a bit long. If you're using a ripe pear, I suspect they'd be done in 15-20 minutes.
Cut each piece of ciabatta bread in half.
On one half of the ciabatta, place 2 oz of pulled pork.
Layer a few roasted pear slices over the pork.
Top the pork with 1 tbs of gorgonzola cheese and a half cup of arugula.
Drizzle a bit of balsamic vinaigrette over the bread, but be sure to save a few tablespoons for dipping.
Place the other half of the ciabatta over the top of the arugula. Press down firmly to close the sandwich.
Grill each sandwich, using a Panini press or a pan on the stove. If using a Panini press, cook for 3 to 5 minutes. If using the stove, cook for 2-3 minutes per side.