1.Heat oil in a saucepan on medium. Add eschalot, lemongrass, chilli and shrimp paste. Cook for 3 minutes, stirring, until fragrant. Add lime leaves, coconut milk and salt to taste. Simmer for 5 minutes.
2.Meanwhile, drain tofu and place in a steamer inside a covered saucepan or wok partially filled with boiling water. Steam for 3 minutes, to heat through. Slice tofu.
3.Place sauce in serving bowls. Top with tofu and extra lime leaves. Serve with steamed rice, asian greens and green tea.
Kaffir lime leaves are available in the fresh produce section of Coles. Store any left over in the freezer.