Here is a presentation of pasta with homemade tomato sauce. There are many ways to prepare a sauce with some fresh ripe tomatoes. It always tastes a lot better that way. If you add a few herbs, it's even better.
Put the instant pot in mode browning
Fry the onion
Add the pasta, tomato sauce, and crushed tomatoes
Add the water
Switch the instant pot to pressure cooking 7min
Serving Size 1