Chicken-Mushroom Fricassee

Ingredients

• 4 pounds boneless, skinless chicken thighs
• 1/2 cup all-purpose flour
• 4 tablespoons olive oil
• 1 1/2 pounds cremini mushrooms, sliced
• 1 medium yellow onion, diced
• 5 cloves garlic, minced
• 1 cup dry white wine (such as Pinot Grigio or Sauvignon Blanc)
• 2 cups low-sodium chicken broth
• 1/2 cup heavy cream (divided)
• 1 tablespoon fresh thyme leaves
• 2 bay leaves
• 1 1/2 teaspoons kosher salt
• 3/4 teaspoon freshly ground black pepper
• 1 1/2 cups instant polenta
• 5 cups water
• 1 pound green beans, ends trimmed
• 1/2 cup Parmesan cheese, freshly grated (optional, for garnish)
• 2 tablespoons fresh parsley, chopped (optional, for garnish)