Hi Martin,
Although not clear by looking at that day, I always usually make sure to have at least a glass of milk too - normally at breakfast time and often have some cereal, also with milk.
Also, I do tend to eat lots of meat also. To be honest, that was one of my most meat free days in a fair while.
I take your point though... but subjectively I seem to have gained muscle if anything, as i do eat plenty meat and do lots of lifting and carrying at work.