To make the marinade, place paprika, cumin, chili flakes, lemon juice, lemon zest and oil in a small bowl. Season with salt and pepper. Stir to combine. Set aside.
Chicken tray bake:
Preheat oven to 200C /400F. Line a baking tray with parchment paper.
Place chicken in a bowl. Add half of the marinade. Coat chicken in the marinade. Set aside. (Marinate for 30 minutes if you have time).
Arrange vegetables in a single layer. Add the remaining marinade. Coat vegetables in the marinade.
Transfer marinated chicken onto the baking tray. Bake for 30-35 minutes or until chicken is cooked through and juices run clear.