Final answer:
The standard portion size of corned beef in a Reuben sandwich is typically 4 to 8 ounces, with 6 to 8 ounces being common in restaurants. The process of measuring the corned beef for the sandwich is similar to weighing beef for a beef stew recipe.
Step-by-step explanation:
The portion size of corned beef in a Reuben sandwich typically ranges from 4 to 8 ounces. In restaurant settings, the standard is often closer to 6 to 8 ounces, but for health-conscious or at-home preparations, individuals might opt for slightly less, around 4 to 6 ounces.
Checking the weight of the corned beef is similar to the process Marcy uses in her beef stew recipe, where she needs to measure 900 grams out of her 1.5 kilograms of beef. Since 1 kilogram equals 1000 grams, Marcy has 1500 grams of beef, which is more than enough for her recipe that calls for 900 grams.