In a large saucepan, bring the coconut milk and curry paste to a boil over medium-high heat, stirring constantly until smooth, about 1 minute. Add the potato, carrots, onion, bell pepper, corn, chile, basil sprigs, lime leaves, and fish sauce. Reduce the heat and simmer, covered, for 30 minutes. Remove the lid and continue to simmer until the vegetables are tender, about 5 minutes. Discard the lime leaves and the basil sprigs. Transfer to a serving dish, garnish with chopped basil and serve over steamed white rice.