How much roast beef for sandwiches 20 people?

Here's a guide to figuring out how much roast beef you'll need for 20 people, keeping in mind it depends on how much people eat and what else is on the menu:

Factors to Consider:

* Appetite: Are your guests big eaters?

* Sandwich Size: Are you making small or large sandwiches?

* Other Foods: Are there other substantial items on the menu? If so, you'll need less roast beef.

General Guidelines:

* Light eaters with other foods: 1/4 pound per person

* Average eaters with other foods: 1/3 pound per person

* Hearty eaters with other foods: 1/2 pound per person

* Main meal, no other substantial food: 3/4 pound per person

Example Calculations:

* Light eaters + other food: 20 people x 1/4 pound = 5 pounds of roast beef

* Average eaters + other food: 20 people x 1/3 pound = 6.67 pounds (round up to 7 pounds)

* Hearty eaters + other food: 20 people x 1/2 pound = 10 pounds of roast beef

* Main meal, no other food: 20 people x 3/4 pound = 15 pounds of roast beef

Important Tips:

* Overestimate: It's always better to have too much than too little.

* Consider Leftovers: Roast beef freezes well, so you can make sandwiches another day.

* Thinly Sliced: If you're buying pre-sliced roast beef, consider thinly sliced to make it stretch further.

Let me know if you can provide more context about your event, and I can refine the estimate!