Ingredients:
- For the soup:
- 3 tablespoons extra-virgin olive oil
- 1 onion, thinly sliced
- 2 cloves garlic, chopped
- Kosher salt
- 4 cups low-sodium chicken broth
- 1 russet potato, peeled and roughly chopped
- 1 large piece parmesan cheese rind
- 2 large skinless, boneless chicken breasts (about 1 pound)
- Freshly ground pepper
- 2 romaine lettuce hearts, chopped
- 1/2 cup heavy cream