Set your Instant Pot to Sauté and add in the olive oil until hot.
Add the onion and pepper and sauté for 5 mins until softened.
Add in the stock and quickly deglaze the inner pot (by scraping the bottom with a wooden spoon) in case anything is stuck on.
Then add in the remaining ingredients ending with chopped tomatoes and beans on top. Do NOT stir.
Cover your Instant Pot, set the vent to seal, select the manual setting and set the timer to 8-10 mins (bigger squash pieces take 10 mins; smaller pieces may only need 8-9 mins - try and see which way you like it), and let the chilli cook under high pressure until done.
When done do a quick pressure release (QPR). When the chilli is ready, stir it thoroughly before serving with some rice, corn tortilla and fresh coriander.
Notes
Click here for a slow cooker version of this chilli.Please note 8-10 mins is the time it cooks under pressure in the Instant Pot. This does not take into account the time it takes to come to pressure.Weight Watchers Points in Instant Pot Three Bean ChilliIf you replace the 2 tsp olive oil used for frying with a calorie-controlled cooking spray, there are: