In a medium saucepan, combine rice, milk, sugar, and salt.
Bring to a simmer over medium heat, stirring frequently.
Reduce heat to low, cover, and simmer for 50-60 minutes, or until rice is tender and the pudding has thickened, stirring occasionally to prevent sticking.
Remove from heat and stir in vanilla extract and cinnamon.
Serve warm or cold.
Notes
Feel free to add raisins or other dried fruits to the pudding while it's simmering. Garnish with a sprinkle of cinnamon or a dollop of whipped cream before serving.