In a bowl, mix 2 tablespoons curry powder with garlic powder, seasoned salt, onion powder, salt, thyme, allspice, and pepper. Coat chicken thoroughly.
Heat oil in a large skillet over high heat. Add remaining curry powder and cook for 2–3 minutes until fragrant.
Add seasoned chicken and reduce heat to medium.
Add water, potato, carrots, scallions, ginger, and Scotch bonnet.
Cover and simmer 30–40 minutes until chicken reaches 165°F and gravy thickens.
If needed, simmer uncovered to thicken gravy further. Serve hot.