1. If you are using almonds, soak them in water for about 30 minutes, and then peel the skins.
Place the rice in a grinder or blender, and grind finely. The rice should resemble corn meal or semolina at this point.
2. Place the rice (and almonds, still whole, if using) into a jar. Add about 4 cups of water and mix. Place lid on jar and refrigerate overnight.
3. The next day, place the mixture and the sweetener into a blender. Gradually adding the remaining 2 cups of water, blend until smooth.
4. Pour this mixture through a cheesecloth (or other filter) into a pitcher. Refrigerate for at least 15 minutes. Enjoy!
You can add almost any spices to this that you like. I enjoy either vanilla, cinnamon, or cardamom.