For the steak: – 2 5 oz filet mignon steaks – Salt and pepper – 2 sprigs of rosemary – 2 tbsp ghee For the blue cheese gravy: – 3 tbsp butter – 1/4 cup flour – 1 1/2 cups chicken stock – 1/2 tsp salt – 1/4 tsp freshly ground black pepper – 2 tbsp sour cream – 2 tbsp crumbled blue cheese