Preheat oven to 300°F. Spray a 4-quart baking dish with cooking spray or butter; set aside.
Combine milk, rice, sugar, salt and vanilla bean and pour into baking dish. Bake in middle of the oven, stirring occasionally, for about 3 hours or until creamy. Remove vanilla bean; stir mixture and add raisins and half-and-half. Chill the pudding, covered, until cold. Dust with cinnamon, if desired.
Chef's Notes: Bake slowly to achieve a creamy consistency. Great when served in a tall glasses layered with fresh fruit.
Source: California Raisins