Turn the heat to low. Add eggs and salt, and gently stir until the mixture begins to form soft curds, about 1 minute. Increase the heat to high, and vigorously stir the mixture, breaking bigger clumps of egg apart. Add 1 teaspoon of butter, and stir until melted. Stir in half of the cilantro. Remove from heat, and serve immediately, garnishing with remaining coriander and a teaspoon of butter. Serve with lightly toasted bread.