Ingredients

3 boneless skinless chicken breasts (about 3/4 lb)

1 tsp. dried oregano

1/2 tsp. garlic powder

Kosher salt

Freshly ground black pepper

3 tbsp. extra-virgin olive oil, divided

8 medium flour tortillas

1/4 c. dijon mustard

8 slices deli ham

1 1/2 c. shredded Swiss cheese

1 c. shredded mozzarella

Grated Parmesan, for garnish (optional)

Freshly chopped parsley, for garnish (optional)

Preparation

Step 1Cook chicken: Season chicken all over with oregano, garlic powder, salt, and pepper. In a large skillet over medium-high heat, heat 2 tablespoons oil. Add chicken and cook until golden and cooked through, about 8 minutes per side. Let rest 10 minutes, then slice into strips.Step 2Assemble quesadillas: Spread mustard onto 4 tortillas, then top each tortilla with 2 slices ham, sliced chicken, Swiss cheese, and mozzarella.  Place remaining 4 tortillas on top. 
Step 3In a large skillet over medium heat, heat remaining 1 tablespoonoil. Working one at a time, cook quesadillas until both tortillas are golden and cheese is melty, about 3 minutes per side.
 Step 4While quesadillas are still warm, sprinkle with Parmesan and parsley before slicing into wedges.

BUY NOW Le Creuset Signature Iron Handle Skillet, $200, amazon.com