In a large bowl, combine the egg, onion, Rice Krispies, 1/4 cup raisins, cilantro, curry powder, and salt.
Add the ground chicken. Mix lightly until just combined—it’s okay if the mixture feels a little sticky.
Using wet hands, roll the mixture into 24 meatballs, about 1 1/4 inches in diameter.
Set your 6-quart pressure cooker to the sauté or browning mode. Heat the olive oil until shimmering.
Working in batches, sear the meatballs on all sides until lightly browned. This step not only adds flavor but helps the meatballs hold their shape.
Remove the meatballs and set aside. Add 1 cup of water to the pressure cooker and scrape up any browned bits stuck to the bottom.
Place a trivet inside the pressure cooker, then arrange the meatballs on top, overlapping if needed.
Lock the lid and close the pressure-release valve. Cook on high pressure for 7 minutes.
Quick-release the pressure and carefully remove the lid.
In a small bowl, mix the yogurt with an extra pinch of curry powder for a tangy sauce.
To serve, top each lettuce leaf with a dollop of sauce, one meatball, shredded carrots, raisins, and peanuts. Sprinkle more cilantro over the top if you’d like.