Turn your oven on to 250C (480F). Slice zucchini into rounds about 1cm (1/2in) thick and place in a baking tray.
Chop chicken thighs into 2 pieces and place on top of the zucchini. Mix tomato and paprika (if using) and pour sauce over the chicken. Sprinkle with a pinch of salt and pop in the oven for 15 minutes.
When the timer goes, scatter the cheese over the top of the chicken and return to the oven for another 5-10 minutes or until the cheese is melted.
Serve with coriander / parsley leaves sprinkled over.