1. Preheat your oven to 200/Gas 6. Cook the Macaroni and set aside.
2. Meanwhile, place a large frying pan sprayed with fry light over a medium heat. Add the spring onions, garlic and cherry tomatoes, stir and cook for 2-3 minutes. Transfer to a wide mixing bowl and add the macaroni.
3.Beat together the stock, tomato puree, yogurt, mustard and eggs until smooth. Pour over the macaroni, then stir in most of the cheese. Season and toss well.
4. Divide between 4 ovenproof dishes, sprinkle over the remaining cheese and bake for 20 minutes or until bubbling. Leave to stand and serve.