Bread and Butter Custard

4 slices day old bread
butter
1 teaspoon grated lemon rind
500ml milk
ground nutmeg
1 tablespoon sultanas
3 eggs
2 tablespoon sugar
1/2 teaspoon vanilla

Beat eggs with sugar, add lemon rind, milk, and essence. Pour into dish, stir in sultanas. Remove crusts from bread, butter each slice, cut into triangles. Place overlapping slices on top of custard, sprinkle with nutmeg. Place dish in a baking dish with warm water. Bake for 55 mins at 175 degrees (celsius)