Cast Iron Mac and Cheese

Ingredients (12)

• 1 pound elbow macaroni
• 8 ounces bacon
• 1/2 medium onion, diced
• 5 dried arbol peppers, crushed (or 2 Teaspoons red pepper flakes)
• 4 Tablespoons unsalted butter
• 4 Tablespoons all-purpose flour
• 3 Cups whole milk
• 16 ounces cheese (I used 8 ounces of Monterey Jack and 8 ounces cheddar cheese)
• 1/4 Cup Parmesan cheese, grated
• 1/4 Cup bread crumbs (optional)
• Salt and  Pepper
• Maybe a drizzle of olive oil