When the chicken is done, add butter to a sauce pan and heat over medium high heat until the butter melts.
Add cardamom, cloves, pepper corns, coriander, garam masala, turmeric and chili powder, or Asian chilli paste, stir to combine, then add grated ginger and grated garlic. Cook for 1 more minute.
Add the tomato paste and a 1/2 cup of water and salt and stir well to combine, simmer for 10 minutes. Add the sugar or honey.
Remove chicken from oven, reserving all the juices from the pan.
Add the chicken pieces, and any accumulated juices from the sheet pan and turn the chicken to coat each pieces, simmer for 5 minutes.
Finally, add a tablespoon of butter and heavy cream and stir continuously until the butter has melted and the sauce is smooth.