Spread ¼ of the refried beans on 4 of the tortillas.
Top each of the 4 tortillas with 2 tablespoons of chunky salsa and 1 ounce of cheese (reduced-fat Colby or Jack cheese would also work very well)
Sprinkle green onions over each of the 4 tortillas.
Top each of the 4 tortillas with another tortilla to make 4 tortilla sandwiches.
Heat a clean skillet over medium heat. Spritz the skillet lightly with nonstick spray.
Cook each quesadilla, one at a time, in the skillet. Flip it over with a large spatula to brown the quesadilla on both sides.
Cut the quesadilla into 6 wedges. Serve with more salsa, Greek yogurt, or mashed avocado/guacamole. (Avocado + jarred salsa makes a nice, quick guacamole.)