In a small bowl, whisk together the milk and flour. Pour into a saucepan and continuously stir on medium heat (don’t go away) until it starts to thicken. This is one of the methods for making white sauce but without having to add butter (the other method, making a roux, requires that you cook the butter and flour, then add the milk). When the milk thickens, add the cheese, and continue to stir until all cheese has melted. Pour the milk and cheese mixture on top of the pasta and cauliflower. Mix well.Bake at 350 for 10 minutes. If you like, broil for 5 minutes or until the top layer has a golden crust.