Place the oil in the Instant Pot and select “Sauté”.
Add the onions and cook for about 3 minutes.
Add garlic and red pepper flakes and cook for about 1 minute.
Add spinach and cook for about 2 minutes.
Select “Cancel” and stir in the remaining ingredients.
Next, secure the lid and cook under “Manual” and “High Pressure” for about 9 minutes.
Select “Cancel” and carefully do a Quick release.
Remove the lid and serve warm.