Search on Alta Vista for:Jim Speirs scouting page
It'll be the first one.
This site is a wonderful source of Scouting Info.
There are suggestions on making the "Silver Turtles"
to your taste. Looks like "anything goes"
Here's the recipe I found:

Silver Turtles

1/4 lb. ground beef, per person
1 potato, chopped, peeled or not your preference,
per person
3-4 small carrots or 1 large, peeled and chopped,
per person
Salt and Pepper to taste
Any other seasoning you prefer, I like to also add
chopped onion.

Take a piece of aluminum foil about 15-18 in long.
Form ground beef into a patty, put in the center of
the foil. Pile potatoes and carrots on top. Sprinkle
with salt and pepper. Close foil envelope like over
everything. Put on/in campfire or grill. Takes 30 to
60 min. Also works in an oven for a children's party.