Due to severe shortages resulting from World War II meat
was often omitted and only animal fat was used.
Nowadays, it’s common to find mincemeat without any
meat products at all.
SSome people don’t even remember why the word
“mincemeat” has “meat” in it at all, finding the idea to
have meat in such a sweet dish not even appetizing.

Modern mincemeat is usually:
fruit
fat (butter or vegetable fats)
spices
Since mincemeat has become a luxury food, ingredients
like spirits, nuts and sweeteners may also be added.

Mincemeat in it’s original form is quite similar to 
North American pemmican and the Russian tolkusha 
which were made in similar ways and for the same
purpose of preserving.

• http://www.holidayinsights.com/moreholidays/October/mincemeateday.htm
• https://en.wikipedia.org/wiki/Mincemeat