- In a large skillet, melt the butter and oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes. 
- Stir in the minced garlic and ginger, cooking for an additional 1-2 minutes until fragrant. 
- Add the chicken pieces to the skillet, followed by the cumin, coriander, garam masala, paprika, turmeric, salt, and black pepper. Cook until the chicken is browned on all sides, about 5-7 minutes. 
- Pour in the tomato puree and stir to combine. Bring the mixture to a simmer and cook for 5 minutes. 
- Reduce the heat to low and stir in the heavy cream and lemon juice. Simmer for another 5 minutes until the sauce thickens slightly. 
- Taste and adjust seasoning if necessary. Garnish with chopped cilantro before serving. 
- Serve hot with cooked basmati rice or naan.