In a large saucepan, add the rice, almond milk, sugar, cardamom, and salt. Stir to combine.
Bring the mixture to a boil, reduce the heat to low, and simmer for 25 minutes, stirring occasionally.
Add the raisins and stir to combine. Simmer for an additional 10 minutes.
Transfer the pudding to a large bowl and let cool for 10 minutes.
Serve the pudding warm or chilled, topped with a sprinkle of ground cardamom and some fresh mint leaves, if desired.