Chop chicken into bit size bits. Add to a bowl with ½ cup of greek yogurt and marinade spices. Mix and cover. Let marinate in the fridge overnight.
Remove chicken from fridge.
Chop onion and set aside.
Chop jalapeño, peel and thinly slice ginger, and mince garlic. Set aside.
In a blender lightly pulse one box of spinach and set aside. It should be finely chopped not pureed.
In a large pan over medium heat, add ghee and sauté onions until soft.
Add ginger, garlic, and jalapeño and continue to cook for 5 minutes.
Add spices and continue to cook until fragrant, about a minute or two.
Add tomato paste and stir until mixed in.
Add crushed tomato and all spinach and bring to a simmer.
Add ½ cup of greek yogurt and heavy cream and return to a simmer, then stir in sugar.
Add chicken and simmer until cooked through, about 30 minutes.