In a large skillet, heat oil over medium heat. Season the cubed chicken thighs with salt and pepper and cook until mostly cooked through (5-7 minutes) and remove from pan
Add in more oil if needed and then add in the potatoes, carrots and onions. Cook until veggies are slightly tender (about 3-5 minutes) then add in the kale, garlic, broth and harissa sauce. Bring to a boil and then reduce to a simmer. Cover the pan for 5 minutes to help cook the potaotes and carrots (add more broth if needed)
Add the chicken back into the pan and let simmer the remaining 5 minutes. Chicken should be cooked through and potatoes should be fork tender. Turn off the heat and add the juice of 1 lemon and the fresh mint. Serve and enjoy!