Tripe
You may have heard of tripe before as an example of something gross your mother threatened to make you eat (mixed with liver probably), but tripe was quite a popular dish in colonial times. It’s the soft lining of animal stomachs like cows or deer.
Believe it or not, tripe is actually very healthy. It’s rich in selenium, zinc, and vitamin B12. Maybe that’s how colonists got their daily dose of vitamins.