In a medium-sized pot, boil water with some salt and oil. Add the pasta and cook till al dente. Drain the pasta and leave it in the colander for now.
Melt butter in a non-stick pan. Add the garlic and saute until just fragrant.
Whisk in the flour and cook for at least 2-3 minutes, stirring continuously.
Add turmeric powder and red chilli powder. Mix well and cook for a minute.
Reduce the heat to low and gradually whisk in the milk. About 1/4th cup at a time, whisking between each addition to combine. Boil the sauce on medium flame until it starts to thicken.
Lower the flame. Add fresh cream, cheese, nutmeg, black pepper powder and salt. Stir through until all the cheese has melted. Turn the heat off.
Toss the pasta through the sauce until completely coated.
Garnish with chopped coriander leaves.