Stir fry the onion in the oil on a medium heat until translucent.
Add the Garlic, Ginger and red curry paste fry for 3 minutes on medium heat.
Now add the tofu and seal well on all sides.
Add the coconut milk, whole chillies, basil leaves lemon grass and fish sauce.
Simmer for 15 minutes or until the tofu is cooked.
Add the lime juice and serve.