Dagmar
Defender of the Bunnies of Skyrim
Unfortunately the health regeneration effect for all stews and soups is bugged. It doesn't work. The stamina regeneration not only works though, it also stacks, so for each additional serving you take you get another point of regeneration per second. Venison stew has the same effect. If you decide to binge on the soups and stews that give the effect you can regenerate a ridiculous amount of stamina per second.I don't think anyone's mentioned this on this thread but Vegetable Soup is a great food item for a sword and board character as it regens 1 stamina per sec (along with 1 health)...
Beef stew is twice as powerful but one of the ingredients, raw beef, is harder to get than the ingredients for vegetable soup. It also doesn't have the health regeneration effect but unless and until Bethesda gets around to fixing the effect it doesn't matter anyway unless you have the PC version of Skyrim. It's relatively easy to fix the health regeneration bug with the Creation Kit, and when fixed that effect also stacks so you can get Shadowmere-like health regeneration if you binge on the soup or stew.