1.Preheat oven to 180°C. Lightly grease a large oven-proof serving dish. Cook pasta in plenty of boiling, salted water for 10-12 minutes until just al dente. Drain.
4.Arrange half the pasta over base of dish, spoon on ½ cup yoghurt mix, then add half the mince. Top with remaining pasta, another ½ cup yoghurt mix and the last of the mince. Smooth top and pour over remaining yoghurt. Sprinkle with extra cheese and thyme.
5.Bake for 40-50 minutes until golden and bubbling.