Instant Pot Mac and Cheese Recipe

0 Combine pasta, water, and salt in the bowl of an Instant Pot. Give everything a stir to combine.
1 Close and lock the lid. 
2 Set the vent to Sealing. 
3 Pressure cook on High, using the time appropriate for the pasta you are using. (See the chart below.)
4 At the end of cook time, leave the Instant Pot on natural release for 5 minutes. Then manually release any remaining pressure. Unplug the Instant Pot or make sure all heating / warming functions are turned off. 
5 Combine milk, butter, mustard, and hot sauce in a microwave-safe bowl. Heat just until the butter is melted and the milk is warm, ~1 minute. 
6 Remove the lid from the pressure cooker and whisk in the milk mixture. Add the grated cheese in 4 portions, whisking well between each addition. 
7 Place the lid back on the machine (no need to seal it, just set it on top). Let the mac and cheese sit, covered, for 5 minutes more. (This last rest time will allow the cheesy sauce to thicken up a bit more and the pasta to finish cooking.)
8 Serve immediately.