Heat a skillet to medium high heat and add the oil. Once the oil is hot, add the beef and sear for 1 minute per side until whole cut of beef is seared. Set aside.
Cut the potatoes and carrots into 1” chunks, peel if desired. Set aside.
While the beef is searing, add the beef cubes to hot water and let dissolve, stir if needed.
Add the carrots and potatoes to the slow cooker, then add the beef cut on top, finally season with the spices.
Add the garlic and the beef broth, cover and cook on low for 6-8 hours.
Carefully remove the beef from the slow cooker and chop or shred into 4-6 potions.
Drain the juices into a bowl then add and whisk the cornstarch until gravy thickens. Add some water if too thick.
Serve plated with veggies and gravy.
Notes
Sear the meat first – Browning the London broil before slow cooking adds more flavor to the final dish.Cut veggies into large chunks – This keeps the potatoes and carrots from turning mushy after long cooking.Thicken gravy at the end – Wait until the meat is done before adding the cornstarch slurry, so the gravy stays smooth.