In a small bowl, whisk together ¼ cup (60 ml) of the coconut milk and cornstarch until cornstarch is completely dissolved. Stir the coconut mixture into the skillet with the remaining coconut milk, peas, ginger, sugar, cumin, salt, pepper flakes and remaining curry powder. Increase to medium-high heat, bring to a boil and cook for 1-2 minutes or until thickened slightly. Remove from heat.