Season meat with salt and pepper, generously, on all sides
Heat a large skillet over medium-high heat. Once the skillet it hot, add the oil. Once the oil is hot, add the meat. Sear on medium-high heat for a few minutes on each side, until all sides are well browned.
Lightly grease a slow cooker with non-stick cooking spray. Place meat in the bottom of the slow cooker.
Stir together the cream of soup mixture and dry onion soup seasoning in a bowl. Pour mixture over the meat in the slow cooker.
Cover and cook on LOW for 10 hours
If adding veggies, add them 4 hours before the timer is up
