Insert inner pot into Instant Pot and press saute button. Wait for the machine to say “HOT”.
Add oil, onion and garlic. Saute for 3-4 minutes, stirring occasionally.
Add remaining ingredients and close lid. Set valve to “Sealing”. Cook on high for about 5 minutes (1/2 the cooking time on the package of pasta you are using).
Let pressure naturally release at end of cooking time for 10 minutes. Manually release remaining pressure and remove lid. Stir and serve.