01 - Rub beef cubes with salt, pepper, and dried thyme, ensuring even coating on all sides.
02 - Transfer seasoned beef to the slow cooker insert. Distribute chopped onion and minced garlic evenly over the meat.
03 - Whisk together beef broth, Worcestershire sauce, tomato paste, and flour in a medium bowl until completely smooth and no lumps remain.
04 - Pour the liquid mixture over the beef and vegetables. Gently stir to incorporate, ensuring the flour mixture coats the meat.
05 - Cover and cook on low setting for 6 to 7 hours, or on high for 3 to 4 hours, until beef is fork-tender and gravy has thickened.
06 - Sample the gravy and adjust salt or pepper as desired.
07 - Spoon beef tips and gravy over mashed potatoes, egg noodles, or steamed rice. Garnish with fresh parsley if preferred.