Greek Mac and Cheese | Saveur

Ingredients

• 3 slices crustless white bread, torn into small pieces
• 9 tbsp. unsalted butter, melted
• Kosher salt, to taste
• 8 oz. hollow pasta, preferably elbow macaroni
• ¹⁄₄ cup flour
• 3 cups milk
• 4 cups grated graviera or kefalotyri cheese (about 12 oz.)
• ³⁄₄ tsp. ground cinnamon
• ¹⁄₈ tsp. freshly grated nutmeg
• Freshly ground black pepper, to taste
• 2 tbsp. extra-virgin olive oil
• 8 large shallots, finely chopped
• 16 oz. baby spinach, roughly chopped
• 8 scallions cut into 1/4"-thick rounds
• ¹⁄₃ cup roughly chopped fresh dill
• 1 ³⁄₄ cups crumbled feta (about 8 oz.)