Taking the time to make a smooth, thick gravy for this slow-cooked dinner is worth it. As the pot roast cooks, the water and juices from the vegetables and meat will thin the gravy out, creating just the right consistency.
Searing the chuck roast thoroughly before slow cooking is crucial for developing deep, complex flavor. Ensure the skillet is hot and don't overcrowd the pan if searing in batches.
When building the gravy, cooking the tomato paste until 'brick-red' concentrates its flavor. Whisking well when adding flour and liquid prevents lumps. The long, slow cook time will break down the connective tissues in the chuck, making it incredibly tender. Resting the roast before slicing allows juices to redistribute, ensuring moisture. Adjust seasoning of the gravy and vegetables just before serving.