Why you keep the sediment in the tray when making roast gravy?

Keeping the sediment in the tray when making roast gravy is essential because it contains concentrated flavors and nutrients from the roasted meat and vegetables. This residue enhances the depth and richness of the gravy, adding a savory umami taste. Additionally, the bits of caramelized drippings contribute to the desired color and texture, making the gravy more appealing and delicious. By incorporating the sediment, you create a more flavorful and cohesive sauce to complement your dish.