Black and Blue Quesadillas

With only five ingredients to work with, strong flavors are the best way to build big taste. This dish delivers with intensely sweet-and-sour balsamic glaze and pungent blue cheese (substitute goat cheese or feta if you prefer).

Pantry Checklist: 

• Red onion
• Flour tortillas
• Deli roast beef
• Blue cheese
• Balsamic glaze