Heat a drizzle of oil in a large skillet over medium-high heat.

Add the stew meat and sear until browned on all sides.

In a slow cooker, whisk together the tomato sauce, apple cider vinegar, molasses, brown sugar, and seasonings until well combined.

Add the browned stew meat and vegetables, stirring to coat everything evenly in the sauce.

Cover and cook on High for 4 hours or Low for 6-7 hours, or until the beef is fork-tender and the vegetables are cooked through.