Butter Chicken by Grateful

– 2 pounds skinless, boneless chicken breasts
– 2-1/2 tablespoons chili powder
– 1 tablespoon lemon juice
– 1/2 stick (4 tablespoons ) unsalted butter
– 3 cloves garlic, finelyminced or pureed
– 1-inch piece ginger, finelyminced or pureed
– 1/2 cup (a 6-ounce/70-gram can) tomato paste
– 2 tablespoons ketchup
– 1 teaspoon garammasala>
– 1/2 heaping teaspoon salt (or to taste)
– 2 tablespoons sugar
– 3/4 cup water
– 1/2 to 3/4 cup heavy whipping cream
– 2 tablespoons chopped cilantro