Chicken and Mushroom Soup

Name: Chicken and Mushroom Soup
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 2 tablespoons olive oil; 1 cup carrots, diced; 1 cup celery, diced; 1 cup yellow onion, diced; 8 ounces mushrooms, sliced; 2 cloves garlic, minced; 1 tablespoon fresh thyme, chopped (or 1 1/2 teaspoon dried); 1 cup uncooked rice (or 1 1/2 cups small pasta like elbow macaroni or bowties.); 8 cups chicken stock (low sodium if possible); 2 cups cooked chicken, diced; salt and pepper