Add protein to your breakfast.
one cup is a HUGE amount..
Blasphemy! oatmeal has protein!
But If you want a real bulker's breakfast, have 1 cup of oatmeal mixed with 1 cup of milk. Since the oatmeal isn't cooked you can eat a lot more before becoming full, and since you have milk its also wet which helps you get it down.
Has something like 400-450 cals, 20ish grams protein, and its very low GI