For the soup base
01 -
1 tablespoon olive oil
02 -
1 tablespoon unsalted butter
03 -
1 medium yellow onion, diced
04 -
2 celery ribs, finely chopped
05 -
1 lb (450 g) cremini mushrooms, sliced
06 -
4 garlic cloves, minced
07 -
2 teaspoons fresh thyme leaves, or 1 teaspoon dried thyme
08 -
1/4 teaspoon chili flakes, optional
09 -
1/2 teaspoon black pepper
For finishing
10 -
6 cups (1.4 L) low-sodium chicken broth
11 -
1 cup (240 ml) heavy cream
12 -
3 cups shredded rotisserie chicken
13 -
3 cups baby spinach, roughly chopped
14 -
1-2 tablespoons fresh lemon juice
15 -
Salt, to taste
16 -
2 teaspoons cornstarch mixed with 2 tablespoons cold water, optional for thicker soup