This recipe was inspired by the Middle Eastern dried seasoning mix called za’atar, a combination of herbs (usually thyme, oregano and marjoram), sesame seeds and sumac, often spiked with salt. Here, fresh herbs are substituted for the dried, which, along with fresh parsley and mint and plenty of lemon and garlic, are used to marinated boneless chicken thighs. If you can’t find sumac, just leave it out. It does add a nice tang and vibrant color, but the dish will work without it. Optimum…