smoothies? milk and yogurt and some protein powder with frozen fruit. Just toss it all in and blend it up. I like frozen strawberries(about 5-6 so it's really icy), 1/2 cup milk, 2 tbs vanilla yogurt, and some vanilla protein powder. EXCELLENT start to your day and easier to eat than real food that you have to chew with morning sickness. It's my breakfast everyday and I keep a granola bar(homemade) in my diaper bag when I run errands for later(like 10am). If I'm home, I have a homemade muffin(applesauce cinnamon with wheat germ and made with whole wheat flour. if that doesn't make you regular and give you protein, nothing will!

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what about parfaits, like fruit, yogurt, and granola? layers of all. PERFECT breakfast, pretty easy to eat at work, or on the run(driving!).
or my other fave, breakfast burrito. One-handed breakfast. whole wheat tortilla, with scrambled eggs and cheese and some green peppers chopped up. If you are a meat eater, toss in some sausage or crumbled bacon and you've got yourself the perfect protein breakfast. Can you tell I like lots of protein in my diet? I'm veggie and a protein chocked breakfast helps hold me over until snack around 10am or so and gets me moving in the morning. There are those mornings that I can't touch anything other than saltines and iced coffee, but I really try to eat well and take my prenatals at breakfast. By lunch I feel 100% better for having done it and my days are WAY more productive.
By the way, all these things take less than 10 minutes to prepare and are pretty simple to eat on the run. I have a very active toddler and school-aged child so I have to be quick too. You can also pre-pack your blender with smoothie stuff at night to throw on in the morning and toss in a to-go cup for work. Or make your parfait in a to-go cup to just grab and go in the morning. I make my muffins and granola bars either at night(while making dinner to multi-task and use the gas oven to the best of my abilities!) or in giant batches on the weekends and freeze them. Toss one or two in a baggie in the morning and run out the door with. In an hour they are defrosted and ready to eat, probably before you are ready!