Middle Eastern Roasted Carrot and Falafel Bake

Name: Middle Eastern Roasted Carrot and Falafel Bake
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: Asian, Middle Eastern
Ingredients: 3 large red onions, peeled and quartered; 4 medium carrots, topped, peeled and cut into thick slices (on the diagonal for larger pieces); 240g (400g / 14 oz tin drained) cooked chickpeas (garbanzo beans); 16 falafel (2 tubs), approximately; 2 teaspoons olive oil; 2 tablespoons harissa paste; 1 tablespoon za'atar; Salt & black pepper; 1 tablespoon tahini; 1 tablespoon lemon juice; 1 1/2 tablespoon vegan mayo; 1/2 teaspoon maple syrup; 1 teaspoon dried parsley; 1 pinch salt and black pepper; 2-3 tablespoons water (more if it needs thinned); 400g (14 oz) hummus (2 standard supermarket tubs); a good squeeze of lemon juice (to taste); 1 teaspoon extra virgin olive oil (or your regular olive oil); 40g (1 1/2 oz) vegan feta (less or more is fine); a small handful fresh coriander (cilantro) or parsley or mint