It's dinner time!

Ingredients

• 2 cups whole milk
• 1 teaspoon kosher salt, or more to taste
• 1 pinch cayenne pepper
• 1 pinch dried mustard
• 1 very small pinch ground nutmeg
• 3 tablespoons unsalted butter, divided
• 1 cup elbow macaroni
• ½ cup panko bread crumbs
• 1 cup freshly shredded sharp Cheddar cheese
• 1 cup freshly shredded white Cheddar cheese