Heat Oli in a large nonstick skillet over medium heat. Add onion and saute 2 minutes or until soft.
2
Remove from heat; stir in spinach, artichokes, mushrooms and garlic salt; set aside
3
Position racks to divide oven in thirds. Preheat oven to 375 degrees F. Coat 2 cookie sheets with nonstick cooking stpray.
4
Place 2 Tortillas on each cookie sheet top each with 1/4cup cheese,1/4cup spinach mixture, another cup of cheese then another tortilla. Press down top of tortilla, then spray with cooking spray.
5
Bake 12 to 15 minutes, turning over quesadillas after six minutes, until cheese has melted and tortillas are slightly brown.