Butter lettuce with shallots vinaigrette. We love salad in our family. Ever since I can remember, I have enjoyed crispy ...

Coming near the top is — butter lettuce? It's also called Boston or Bibb lettuce. But unlike real butter, this is crammed with folate, iron, and potassium. No Caesar salad is complete without ...

Also called Boston and bibb lettuce, butter lettuce is the most nutritious of the lettuces on this list. The leaves are higher in folate, iron and potassium than iceberg and leaf lettuces.