In a large non-stick skillet heat oil over medium high heat. Add ginger and garlic and cook until aroma is released. Stir in chicken pieces and cook until golden brown. Stir in chili powder, peanut butter, and chili sauce. Stir in scallions and coconut milk and simmer until thickened about 3 minutes. Season with salt and pepper. Spoon over rice and garnish with cucumber and cilantro Serve with Basmati rice following directions on the box.