Place spelt in a medium saucepan. Cover with water to 2 inches above spelt; bring to a boil. Cook 2 minutes; remove from heat. Cover and let stand 1 hour.
Drain.
Place spelt in a food processor; process 45 seconds or until spelt resembles coarse meal.
Preheat oven to 27
Combine spelt, milk, sugar, salt, cardamom, and vanilla in a 2 quart-casserole coated with cooking spray.
Bake at 275 for 3 1/2 hours, stirring every hour to prevent a skin from forming.