Broccoli with Creamy Parmesan Sauce

1 pound broccoli
1 tablespoon all-purpose flour (I used whole wheat and it was fine)
1 cup milk
1/2 cup freshly grated Parmesan cheese
1/4 teaspoon salt
pinch of ground white pepper
pinch of ground nutmeg

1.  Trim broccoli stalks, steam until tender, 5-7 minutes
2. Meanwhile, whisk flour and 1/4 cup milk in a small bowl until smooth.  Heat the remaining 3/4 cup milk in a saucepan over medium-low heat until steaming.  Whisk in the flour mixture; cook, whisking, until thickened, 2 to 4 minutes.  Remove from the heat; add cheese, salt, pepper and nutmeg.  Drizzle over the broccoli.  Serve warm.