Combine the first 7 ingredients in a bowl. Preheat the oven to 200 degrees F. Set a large, non-stick skillet over medium heat. Place an equal amount of the bean mixture on one half of each tortilla. Fold each tortilla into a half-moon shape. Cook 2 of the stuffed tortillas 3 minutes per side, or until the cheese is melted and the tortillas golden brown. Set the cooked quesadillas on a baking sheet and keep warm in the oven while you cook the last 2. Cut the quesadillas into wedges and serve with salsa for dipping.
Note: Poblano peppers are mildly spicy and have a richer flavour than green bell peppers. They are available in the produce department.