Low-Carb Chicken Soup

Name: Low-Carb Chicken Soup
Cook time: 50 min
Total time: 50 min
Cuisine: American
Ingredients: 2 tablespoons extra-virgin olive oil; 1 medium yellow onion, chopped; 1 (8 ounce) package sliced cremini mushrooms; 2 celery stalks, thinly sliced; 2 carrots, thinly sliced; 2 tablespoons minced garlic; 2 teaspoons chopped fresh sage; 0.25 teaspoon cayenne pepper; 1 dried bay leaf; 2 pounds bone-in chicken thighs, skin removed; 8 cups unsalted chicken broth; 0.5 teaspoon salt; 0.5 teaspoon ground pepper; 2 cups chopped stemmed lacinato kale; 2 tablespoons fresh lemon juice