- Heat oil or ghee in a large pan over medium heat. Add garlic and ginger paste, then methi, and cook for 30 seconds until fragrant. 
- Add onion paste and cook for 3-4 minutes until golden brown, stirring frequently. 
- Stir in mixed spice powder and garam masala, cooking for 1 minute. Add diluted tomato puree and cook for 2 minutes. 
- Add ketchup, mango chutney, lemon juice, sugar, and salt. Mix well and cook for 3-4 minutes. 
- Cook sauce until thickened, adding water gradually to achieve desired consistency. 
- Add chicken pieces, ensuring they're well coated with sauce. Simmer for 12-15 minutes until chicken is fully cooked. 
- Stir in mint, coriander, and cream. Cook for another 2-3 minutes. 
- Optional: add a few drops of red food coloring for authentic restaurant appearance.