Simmer for 20 minutes. Make sure the rice is thoroughly cooked
Transfer the cooked rice into a clean saucepan. Add 1½ cups half and half, sugar and salt. Cook over medium heat until creamy. About 15-20 minutes
Stir in the rest of the half and half then add the beaten egg, and raisins. Cook for another 2 minutes. Stirring constantly.
Remove from the heat and stir in the butter and vanilla.