Ingredients
Bolognese sauce
Cream sauce
Method
1.Make bolognese sauce: heat a large frying pan on medium. Spray with oil. Cook onion and garlic 5 minutes, stirring, until soft. Add carrot and celery; cook further 5 minutes.
2.Increase heat to high. Add mince. Cook 5 minutes, stirring to break up any lumps, until browned. Add tomato, parsley, oregano and water. Simmer, stirring occasionally, 25 minutes.
3.Meanwhile, bring a large saucepan of salted water to the boil. Add rigatoni. Boil, uncovered, 12-13 minutes, until al dente. Drain and return to pan. Pour over butter. Add 1/2 cup of parmesan and mix well. Season to taste. Set aside.
4.Preheat oven to 200°C (180°C fan-forced). Grease two 10-cup capacity ovenproof dishes.
5.Make cream sauce: melt butter in a saucepan on low heat. Add flour. Cook, stirring, 2 minutes. Add milk; bring to the boil, whisking constantly. Cook 5 minutes, until mixture thickens. Remove from heat. Add nutmeg. Season to taste. Cool slightly, then whisk in beaten egg.
6.Add 3 beaten eggs to rigatoni; toss to coat. Spoon half into prepared dishes. Cover with bolognese sauce; top with remaining pasta.
7.Spoon over cream sauce; spread out to completely cover pasta. Sprinkle over remaining parmesan. Bake 30 minutes, until golden. Stand 10 minutes, before serving.