In a large pot, melt 4 Tbsp of butter over medium heat and add 4 tsp of olive oil.
Add the finely chopped onion and sauté for about 5 minutes, until the onions are tender.
Add the jalapenos, cloves of garlic, and ground ginger. Sauté for another 5 minutes.
Add the tomatoes, tomato paste, garam masala, and salt. Sauté for another 5 minutes.
Add 2 cups of water. Bring to very gentle boil over medium/low heat (just until you see one or two bubbles). Cover and let simmer for 15 minutes.
Add 1 cup of heavy whipping cream. Cook for about 5 minutes. Add the chicken to the mixture.
While the sauce and chicken simmer, prepare the basmati rice according to package directions.
Serve sauce over the rice and enjoy!