First,put 6 glasses of water and a glass of rice into a pan and simmer.When thickened,add a liter and a half of milk.As soon as the mixture starts to boil add 2 glasses of sugar and the vanilla.While this is cooking, mix the rice flour with a little water and add to the rice pudding.Continue cooking for 10 minutes,then pour into bowls. When cool,decorate with walnuts and cinnamon.