You can sub a protein drink for the liquid in muffin recipes. Muffins are great breakfast food when you make your own and add all the good stuff.
A glass of milk is what I drink in the morning to get protein. I like the nut milks, more protein per ounce and less calories. I don't buy low fat or skim milks. All the good stuff is taken out.
Beans and rice is the perfect combo for powerful protein. We have beans and rice at least twice a week. It's easy to make burritos, casseroles, stir fry, etc using beans and rice.