Creamy Italian Chicken in Tomato Sauce (Keto Recipe)

Ingredients

• 4 boneless skinless chicken breasts ((about 1 1/2 lb. / 650g))
• 1 tsp Italian seasoning
• sea salt
• pepper
• 2 Tbsp olive oil (divided)
• 1 Tbsp ghee or clarified butter
• 1 medium onion (diced)
• 2-3 cloves garlic (minced)
• 1 jar (15 Oz / 450ml) tomato-basil sauce
• 1/2 cup heavy cream
• 1/2 cup green olives (pitted if desired)
• 1/4 cup grated Pecorino cheese
• 1/4 cup shredded pecorino cheese
• a small handful of fresh chopped parsley or basil (to garnish)