Ok...Here's THE recipe for canning tomato juice that doesn't separate. Just like store bought tomato juice. The trick is to bring the juice to a rolling boil again AFTER you have run it through your food mill. I usually juice around 2-3 bushels of tomatoes per year. In order to get that 'Store Bought' consistency, mix your tomatoes 50/50 roma and regular. So I always buy a bushel of romas and a bushel of regular. This year we bought 2 bushels each and have lots of juice for the year. This recipe should yield around 15 quarts/litres in general.