Rinse, dry, and spatchcock the chicken.
Use a spoon to separate the skin from the meat. Place the compound butter between the skin and the meat.
Rub the outside of the chicken with olive oil, then cover the chicken in the dry spice rub. Drizzle olive oil over the chicken.
Add onion, garlic, ginger, lemongrass, herbs, chicken broth, and white wine to the baking sheet.
Place the chicken on top (use a baking sheet rack if possible). Cover the chicken with foil and bake for 50 mins. Uncover the chicken and allow it to roast for 10-20 mins. Remove the chicken and allow it to rest for 15 minutes.
Pour the juices, garlic, ginger, lemongrass, and herbs from the baking dish into a small pot. Add 1 cup of chicken broth, and cornstarch and allow it to boil and reduce. Then, strain, and serve with the Curry Chicken.