Coat a large nonstick skillet with cooking spray; heat over medium-high heat. Add mushrooms, spinach, shallots, jalapeno, oregano and ½ tsp salt; sauté until vegetables have softened, 5-10 minutes.
In a small bowl, stir together sour cream, chipotle peppers and a pinch of salt. Spread half of each tortilla with 1 Tbsp cream mixture; top cream mixture with ¼ of vegetables and 2 Tbsp goat cheese. Fold empty tortilla halves over filling; press down gently to close.
Off heat, wipe out skillet and coat with cooking spray; heat over medium-high heat. Cook quesadillas, flipping once, until lightly toasted and cheese melts, 3-4 minutes per side.
Serving size: 1 quesadilla
