Chicken Vegetable Soup Recipe

Name: Chicken Vegetable Soup Recipe
Ingredients: 8 bone-in skinless chicken thighs; 3 quarts cold water; 1 tablespoon olive oil; 2 yellow onions (peeled and diced); 4 large carrots (peeled and chopped); 4 ribs celery (chopped); 5 cloves garlic (minced); 2 teaspoon salt (plus more to taste); 1 teaspoon black pepper; Juice from one lemon; 2 bay leaves; 2 zucchini (sliced into quarters and chopped); 2 yellow squash (sliced into quarters and chopped); 1 large bunch kale (woody ends removed and chopped); red chili flakes and fresh parsley (to garnish)