1. Wash the rice until the water runs clear.
2. Cook the rice with 7 cups of water until it completely softens and dissolves in water. This may take up to an hour. While the rice is cooking, give it a stir every 5 minutes or so.(You may need to add some more hot water while it cooks.) 
3. Add the sugar and butter, while stirring.
4. Add saffron and rosewater, and stir in completely.
5. Pour the pudding into individual serving bowls.
6. Decorate with your choice of cinnamon, crushed almonds, and/or pistachio.

Cinnamon is the most commonly used to decorate this rice pudding, but almonds and pistachios are other good choices.