If were talking for work I usually eat left overs like most people and divvy it up into easily stackable Tupperware.
Lately I have been into “breakfast cookies/overnight oats” if you will for breakfast. Nice because you can make then the night before and in my case make a big batch for 2 or 3 days. Mine usually include oats, peanut/almond/cashew butter, hemp milk, raw nuts, quinoa, & depending on the day coconut, chocolate chips, goji berries, with a dash of cinnamon, nutmeg, and salt.
More or less stir ingredients and let sit over night.