Heat oil in a skillet and cook mushrooms over medium heat until caramelized. Add spinach on top and cook just until wilted. Spray a separate skillet with cooking spray and lay tortilla in the pan over medium high heat. Layer tortilla with cheese, then add spinach and mushroom mixture over one half. Cook until cheese starts to melt, the fold cheese side over fillings and cook until lightly browned on both sides. Serve with salsa and toppings of your choice.
Recipe by Cooking With MicheleĀ® at https://cookingwithmichele.com/2011/05/spinach-and-mushroom-quesadillas/