I love oatmeal, made with vanilla unsweetened almond milk, with about a quarter cup of chopped nuts, I know you said other than oatmeal or smoothies, but I love them both!
Don't forget about adding raisins. Or frozen blueberries, or peanut butter, to oatmeal, you can add in a lot of. variety.
That said my other go to is scrambled eggs and salsa, love it, it's great to look for if you're traveling at a hotel breakfast, if you can tolerate you can scramble egg whites. I like to sauté veggies, too and scramble the egg as mentioned above.
If you're in a hurry, nature. valley crunchy oat granola bars are good in a pinch, better than some chewy ones.
Cheerios are good with the van. Almond milk, too.
Best of luck
