Season the beef on all sides with 1 tsp each of salt and freshly cracked black pepper, and optionally with 2 tbsp of all purpose flour (see Note 1); you can cut the beef into cubes of your preferred size but smaller pieces will cook faster
Heat a large Dutch oven or pot over medium high heat and add 1 tbsp of avocado oil
Sear the beef on each side until browned then remove and set aside - sear in batches and don’t overcrowd the pot or it will steam instead of searing
Reduce heat to medium low, add the remaining tbsp of avocado oil, then add the onion, carrots and celery and season with a pinch of salt
Stir and cook for 6-8 minutes until softened, then add the garlic and cook for another min
Add the red wine and scrape to deglaze the pot then simmer until reduced almost completely (or use an extra ½ cup of stock; see Note 2)
Add the thyme, bay leaves and the remaining tsp of freshly cracked black pepper (you can tie the thyme with butcher's twine to make removing the sprigs easier later)
Pour in the beef broth and Maggi sauce and stir
Bring to a boil then cover with a lid and reduce to a simmer; simmer for 2-3 hours or until beef is tender (total cooking time will depend on the size of the beef pieces)
Add the barley and stir, then cover and cook for another 35-45 minutes or until barley is cooked through and beef is very tender; uncover during the last 15 minutes (see Note 3)
Remove the thyme sprigs and bay leaves, season with ½ tsp salt or to taste and serve topped with fresh parsley