Step 1: In a medium saucepan, combine the whole milk, unsalted butter, whole yellow onion, garlic cloves, whole cloves, and bay leaves. Place the saucepan over medium heat and slowly bring the mixture to a gentle simmer. Allow it to simmer for about 10 minutes.
Step 2: Carefully strain the mixture through a fine-mesh sieve into a clean pot or large bowl, discarding the solids.
Step 3: Return the strained milk to the heat and add the fresh breadcrumbs, ground nutmeg, and salt. Stir to combine and cook for an additional 5-7 minutes until thickened.
Step 4: Serve the bread sauce over roasted meats or as a dip for bread.
Notes
For a richer flavor, consider adding a splash of cream after thickening. Use day-old bread for the best texture.