Preheat the oven to 220C/450F Place the chives, tomatoes, into a lidded ovenproof dish.
Snap the gluten free spaghetti until the strands are short enough to fit inside the ovenproof dish.
Add the gluten free spaghetti strands to the dish and pour over the boiling water, tomato puree and chopped tomatoes. Stir well and sprinkle over the paprika.
Cover the ovenproof dish with the lid and transfer to the oven for 25 minutes, or until the spaghetti is cooked through.
Sprinkle with a little grated mozzarella, pop back into the oven for a further five minutes until the cheese has melted. Serve immediately.