The Best Chicken Quesadillas

Name: The Best Chicken Quesadillas
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: Mexican
Ingredients: 1 teaspoon salt (I use coarse, kosher salt); 1/2 teaspoon onion powder; 1/2 teaspoon garlic powder; 1/2 teaspoon dried oregano; 1/2 teaspoon cumin; 1/2 teaspoon chili powder; 1/2 teaspoon paprika, smoked or regular; 1/4 teaspoon black pepper (I use coarsely ground); 4 cups cooked, chopped chicken; 1 tablespoon oil; 2-3 cups sliced mushrooms (optional - see note); 2 medium bell peppers (any color), cored and sliced into thin strips; 1 large onion, sliced into thin half moon strips; 2-3 tablespoons broth or water; 2 cups shredded Monterey Jack cheese; 1 cup shredded medium or sharp cheddar cheese; 8 8-inch flour tortillas