Mustard Macaroni and Cheese

Details

Ingredients

• ½ (8 ounce) package Cheddar cheese, or to taste
• 4 slices back bacon
• 1 (8 ounce) package elbow macaroni
• 1 tablespoon butter
• 1 tablespoon all-purpose flour
• 1 pint milk
• 2 teaspoons Dijon mustard (such as Maille Dijon Originale®)
• salt and freshly ground black pepper to taste
• 1 leek, trimmed and cut into thin rings