Add the chickpeas, onion, carrots, zucchini, red bell pepper, diced tomatoes, dried apricots, and vegetable broth to the slow cooker.
Stir in the cumin, coriander, cinnamon, paprika, salt, and black pepper until everything is evenly coated.
Cover and cook on low for 6 to 7 hours until the vegetables are tender.
About 10 minutes before serving, prepare the couscous according to package directions in a medium pot.
Fluff the cooked couscous with a fork and divide it among four bowls.
Spoon the chickpea tagine over the couscous and top with chopped parsley and a squeeze of lemon.