Step 1

Place the spaghetti, water, salt, butter, and mustard powder into a medium to large sauce pot. Bring the pot to a simmer over medium heat, stirring frequently. Put the asparagus in during the last 3 minutes of cook time, and let simmer until the pasta is tender. Reduce the heat to low.

Step 2

Stir in the milk, cayenne, herbs, and cheese. Stir until the cheese is melted and combined.

Step 3

Serve hot!