Carefully remove the dish from the oven and let the roast rest, still covered, for about 10 minutes. This helps the juices settle back into the meat so it stays melt-in-your-mouth tender.
Uncover and use two forks to gently shred the beef directly in the casserole dish, mixing it into the thick tomato gravy until everything is evenly coated. Taste and, if desired, add a small pinch of salt and black pepper to the sauce.
Serve the shredded tomato soup pot roast hot, spooning plenty of the thick red gravy over your choice of mashed potatoes, noodles, or rice.
If you want to stretch this into a full one-dish meal, tuck a few peeled, halved carrots and chunked potatoes around the roast before pouring on the tomato soup mixture (this technically adds more ingredients, but keeps the spirit of the recipe). For a slightly deeper flavor, sear the chuck roast in a hot skillet with a bit of oil for 2 to 3 minutes per side before placing it in the casserole dish, though it’s completely optional for busy nights. You can swap the dry onion soup mix for a beefy onion version or a garlic and herb mix if that’s what you have on hand. If you prefer a looser sauce, stir in 1/4 to 1/2 cup water or beef broth with the tomato soup before baking. Leftovers freeze well for up to 3 months and reheat beautifully on the stovetop with a splash of water to loosen the gravy. For a fun twist, pile the shredded beef and gravy onto toasted hoagie rolls, top with shredded mozzarella or provolone, and broil for a few minutes for easy cheesy sandwiches.
