Set oven to 350F.
Season chicken breasts with Harissa, fresh rosemary and cumin. Feel free to use other spices but be careful of too much sodium.
Place a cast iron skillet on medium-high heat and spray with coconut oil. Sear the chicken breast on both sides (about 3 to 5 minutes) until brown.
Add cherry tomatoes and fresh rosemary to the skillet. Bake in the oven for 15 to 20 minutes depending on thickness of chicken breasts.