Classic Chicken in Red Wine

2 tablespoons olive oil

6 quarter chicken pieces (legs and thighs)

1 1/2 teaspoons kosher salt , plus more for chicken

Freshly ground black pepper

1 (1 pound) bag frozen pearl onion s, thawed

8 cloves garlic , smashed

1 pound cremini mushroom s, halved

3 russet potato es, peeled and cut into large rounds (thirds)

3 carrot s, peeled and cut into 2-inch pieces

1/3 cup all-purpose flour

4 sprig fresh thyme

2 bay leaves

2 1/2 cups full-bodied red wine

2 cups low-sodium chicken broth

1/2 cup fresh parsley leaves, roughly chopped

3 tablespoons red wine vinegar