First, butterfly the chicken breasts. I do this by laying the chicken breast down on a cutting board. Then, placing my hand on the top of the chicken and running the knife horizontally to my hand, thus cutting the chicken breasts in half and opening them up so they resemble a heart.
Sprinkle 1 tablespoon of the harissa powder and 1/2 to 1 teaspoon of lemon zest onto the chicken.
Place the oil in a skillet set on a stovetop that has been set to medium-high heat.
Place the chicken into the pan, with the seasoned side facing down. Add a tablespoon of lemon juice and cover the pan. Let the chicken sauté in the covered pan for 4 minutes.
Remove the cover and flip the chicken over. The flipped side should be golden brown. Add in another tablespoon of lemon juice and cover the chicken in the pan again and let the chicken cook for 3 minutes.
Remove the pan from the heat, and leave the cover on the pan. Let the chicken rest in the covered pan for 8–10 minutes.
Remove from the pan, and season with salt and pepper to taste. If you want to make it gorgeous, garnish it with some chopped cilantro or parsley, and enjoy!