directions
Heat the oil in a large pan over medium-high heat, add the beef and brown on all sides, about 20 minutes and set aside.
Add the onions and cook until tender, about 2-3 minutes, before adding the garlic and red pepper flakes and cooking until fragrant, about a minute.
Place the beef, onions, broth, balsamic vinegar, soy sauce, brown sugar, Worcestershire sauce, carrots and potatoes in a slow cooker, cover and cook on low for 8-10 hours or on high for 3-5 hours. (The beef will be falling apart tender when done!)
Remove the carrots, potatoes and beef and slice or shred the beef.
Skim any fat from the cooking juices, place it in a sauce pan, bring to a simmer, add the mixture of the cornstarch and water and cook until the glaze has thickened a bit.
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