Substitute 1 bag or 3 pints of homemade sauerkraut if preferred.
Adding the apple and onion takes away the after-effects of the sauerkraut.
If adding dumplings, do so after step 3. Remove cooked roast from roasting pan and pour sauerkraut mixture into a large pot, stirring in more water if needed. Bring to a boil. Drop dumpling batter by teaspoonfuls on top of boiling sauerkraut. Reduce heat, cover tightly, and steam dumplings until cooked, about 12 minutes.
Nutrition data for this recipe includes the full amount of canned sauerkraut. The actual amount of sauerkraut consumed will vary.