Add the remaining 1 tablespoon oil and onion to the pan. Cook, stirring occasionally and scraping up any browned bits, until the onion is soft and lightly browned, about 4 minutes. Stir in lemon zest, garlic, ginger, tomato paste and ras el hanout. Cook, stirring, until fragrant, about 30 seconds. Stir in broth, chickpeas, apricots, olives, 1/4 cup almonds and the chicken. Bring to a simmer and cook, stirring occasionally, until the chicken is cooked through and the sauce has thickened slightly, about 8 minutes.