Turn the Instant Pot to saute’; cook hamburger meat until done and drain.
Add the meat back to the Instant Pot along with the taco seasoning and water; stir for a couple of minutes until combined; turn the Instant Pot off.
Now add the pasta, beef broth, water and Rotel.
Place the lid on the pot and set to seal.
Set on high pressure 4 minutes.
When the time is up, do a quick release.
Remove the lid and stir in the cheese.
Top each serving with diced tomatoes and sour cream if desired or enjoy without.