Turn on Sauté setting. Once hot, add olive oil, serrano pepper, ginger, and onions. Sauté for 3-4 minutes, stirring frequently.
Add garlic, curry paste, and curry powder and stir to coat. Sauté for another 2 minutes.
Then add all remaining ingredients except spinach. Stir to combine.
Lock lid and switch IP to manual setting and set for 15 minutes. Once cook time is complete, allow pressure to naturally release for 10 minutes. Then switch valve to release remaining pressure.
Remove lid and add spinach, then mix well until spinach is wilted.