Beef with Wild Mushrooms

INGREDIENTS

• 3 olive oil, divided
• 1 2-pound boneless beef chuck roast
• Kosher salt
• 4 medium onions, coarsely chopped
• 2 garlic cloves, smashed
• 1 sprig thyme
• 1 bay leaf
• 1 dry red wine
• 8 low-sodium beef broth
• 8 mixed mushrooms (such as hen of the woods, chanterelle, crimini, and stemmed shiitake), torn into large pieces
• Flaky sea salt (such as Maldon)