Pat the beef stew meat dry with a paper towel and season evenly with sea salt and black pepper.
Heat the avocado oil in a heavy-bottomed pot or Dutch oven over medium-high heat.
Sear the beef in batches until a deep brown crust forms on all sides, then remove and set aside.
In the same pot, add the pearl onions, sliced carrots, and mushrooms, sautéing until the vegetables are slightly softened.
Stir in the minced garlic and tomato paste, cooking for one minute until fragrant.
Return the beef to the pot and pour in the beef bone broth, scraping the bottom to release the flavorful browned bits.
Add the dried thyme, cover the pot, and reduce heat to low, simmering for 60 minutes until the beef is fork-tender.
Remove the lid and simmer for an additional 10 minutes to thicken the sauce, then garnish with fresh parsley before serving.