Oats vs Five Grains

Question

In your answer about matzah made from oats, you stated that oats are not one of the five grains, and provided pretty convincing evidence. Does this mean that the proper bracha over oats is pri haadama, not minei mezzunot? I heard it makes a difference if it's cooked or not - can this be true? Thanks so much for your help, and shavua tov.