Cube your chicken breasts into bite-size pieces (about ½ inch). Toss them with the greek yogurt and lime juice and set aside.
Turn your pressure cooker to “saute” and add the olive oil, chicken, garlic, onion, ginger, and spices. Saute for 5 minutes and turn the pressure cooker off.
Add the tomato paste, water and brown sugar, give it a stir to combine, close the lid, and flip the pressure cooker valve to “seal.” Turn on the pressure cooker function and set it for 10 minutes on high. When finished, turn off the pressure cooker, manually release the pressure, and slowly remove the lid.
Stir in the coconut milk, butter, and rice vinegar. Continue to stir until the butter is melted. Serve over rice, with desired toppings, and/or with naan.