Parboil the brats for 10 minutes, brown in the broiler, and serve the next day in a Nesco floating in beer and onions. PUrists will sneer at pre cooking but it's a necessity in this case. Works for us. Use Johnsonville if you can get them. They have a Stadium brat that is already pre cooked and very tasty.
Foods such as orange juice and milk are definitely enriched with vitamin D, but these foods are not intended to be good sources of Vitamin D, they are merely foods designed to prevent the most obvious vitamin deficiencies, particularly in children.
This prompted Minute Maid and Tropicana to begin adding it, along with calcium, to some of their products. (A division of Coca-Cola, which owns Minute Maid, funded Holick's study.) Still, the question remained of whether the body could make use of as much vitamin D from orange juice as it could from a supplement. So the team recruited about 100 adults and had them drink a glass of orange juice every morning and to swallow a capsule every night for 11 weeks.