Heat a large 12 inch skillet to medium heat, spray lightly with cooking spray.

Assemble quesadilla by sprinkling shredded cheese on half of the tortilla shell, topped by the sliced and salted avocado.

Heat quesadilla in skillet until cheese is melted and tortilla is lightly browned.

In a small bowl combine spinach, sour cream and salsa, stir lightly to coat.

When ready to serve spread spinach mixture on tortilla, fold over and serve.