Soak the sago in the water for 15 minutes. Grease an ovenproof dish with the 1 teaspoon butter and set aside.
Preheat your oven to 180 degrees celsius. Pour the milk into a large pan. Add the cinnamon stick and the vanilla paste. Heat it up just until it reaches boiling point. Add the soaked sago and give it a stir. Simmer on a low heat for 5 minutes. Do not cook it too long as you don't want a mushy sago pudding. The sago will be transparent once cooked. Remove from heat.
Whilst the sago is cooling down a little, separate the egg yolks and whites.
Mix the condensed milk into the egg yolks and set aside.
Add the castor sugar to the egg whites and whisk until stiff.
Pour a ladle full of the sago mixture into the condensed milk/egg mixture and use a fork and give it a mix.
Add the egg mixture into the sago and mix well. Add the cinnamon and mix.
Fold the egg whites into the sago pudding. Pour the sago mixture into the greased dish. Place the sago pudding into a baking pan half filled with water and bake for 25-30 minutes.
As soon as you remove the sago pudding from the oven, heat 2 tablespoons of the apricot jam in the microwave for about 30 seconds. Spread this on top of the sago pudding.
Serve hot with the remaining apricot jam, you can heat the jam.