Finely puree tomatoes, jalapenos, and ginger in food processor. Then stir in cream, yogurt, and salt
Melt butter over medium heat and continue heating until foam subsides, stirring constantly. Add chicken in batches, browning and removing each batch
Add ground cumin and paprika to the butter and saute for a few seconds
Add tomato mixture and chicken, along with any juices/butter
Pressure cook for 8 minutes, then natural release for 7 minutes, then quick release
Mix together cornstarch and water in a small bowl
Add garam masala, roasted cumin, and cornstarch/water mixture
Bring to a boil and reduce until desired consistency is achieved