Preheat oven to 350 degrees F. Pour scalded milk over Grapenuts and let sit 5 minutes. Beat eggs, sugar, salt,cinnamon or cardamon and vanilla. Add to milk and Grapenuts. Pour into a greased 2-quart casserole dish. Sprinkle very generously with nutmeg. Set in a pan of hot water and bake until a knife inserted 1 inch from the center comes out clean which is usually 45 minutes or longer.