Last night I finished up making the snacks for the party this weekend. I've read several times that there are numerous examples of the Vikings using pea flour in their bread, and I had to try it.
I used my hand-cranked grain mill to grind split peas into fairly fine flour, then mixed it with barley and oat flours and proceeded as I described for the other breads. The result is quite tasty, and the pea flavor is not really evident, which is interesting.
The last thing I made was some root vegetables in sour cream. Beets with sour cream is a common modern Scandinavian dish, but I didn't have any evidence for beets in a Viking context, so I used diced carrots and parsnips. I sauteed them until semi-soft, then added sour cream, salt, cumin, and mustard seed (whole). Pretty good on the crackers.
I'll post some info on sources soon, I don't have them on my just now.