Yes bread was made from oats and rye. Both those crops were very much grown as the type of land was suitable. Even today both are plentiful. Very little wheat as the land is not strong enough, or rich enough to produce a paying crop. Of course there "gardens" or fertile places where it is grown but they are few and far between.
The oats and rye were ground locally. Many hand hand querns; two stones with a hole in each. Attached to the upper one was an iron handle and by means of this it was brought round. The ground stuff falling through a hole very small in