Sorry I just noticed you can't do the oatmeal.
Have you tried fruits for breakfast, cantalope and other types of melons?
Some ideas for snacks... nuts (almonds are one of the best), cheese, dark chocolate (70% cocoa or higher), pork rinds/scratchings, cold meats, boiled eggs, peanut butter.
I hope it helps!
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Regards;
Danny 
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