Weigh out 250g of cooked pasta and place in a mixing bowl.
Spray a 20cm square baking dish or similar with cooking oil spray.
Now in a jug, whisk together 4 eggs and stir in to the cooked pasta, add some seasonin, 40g of the grated cheese and give it a really good stir before transferring in to the baking dish.
Bake for 20 minutes.
Then mix the tomato puree and water to thin out and spoon on top of the baked pasta and sprinkle the remaining cheese on top.
Finally top with whatever toppings you cheese and bake for a final 15 minutes.