One-Pot Chicken & Mushroom Casserole

Name: One-Pot Chicken & Mushroom Casserole
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 1 tablespoon plain flour; 8 chicken thigh cutlets (bone in); 1 tablespoon olive oil; 1 brown onion, finely diced; 2 garlic cloves, crushed; 2 carrots, peeled, halved lengthways and sliced; 2 stalks celery, trimmed and sliced; 300g button Swiss brown mushrooms; 1½cups chicken stock; 3 sprigs fresh thyme; 2 teaspoons cornflour; 1 cup frozen green peas; Mashed potatoes, steamed rice or couscous, to serve