I came across this older article with a few suggestions for high protein breakfasts. I personally have the oatmeal listed here a few days a week ( when I am being good ). Since I often don't have a break in my schedule until close to noon this usually fills me up nicely and holds me over until lunchtime.
Let me know what you think.
http://www.huffingtonpost.com/2013/08/10/high-protein-breakfasts_n_3732490.html