Chicken Gorgonzola Quesadillas

Ingredients (9)

• + 2 large skinless, boneless chicken breast halves, cut into bite-size pieces and pounded thin add to pantry
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• + 1 tablespoon olive oil, or as needed add to pantry
• ✓ ½ onion, chopped
• ✓ 2 cloves garlic, minced
• + 2 flour tortillas, or more as desired add to pantry
• + 1 (5 ounce) package crumbled Gorgonzola cheese add to pantry
• + 1 cup cooked spinach add to pantry