This seems like a trick question.
You need to plan two meals, adequate for fueling 30 mile days.
Yet fit in a pocket. No cooling or heating available.
There are plenty of solutions with no nutrition.
IMHO, if you want to eat healthy in this scenario, you're screwed.
I'd concentrate on getting microwave / dorm type fridge in your work environment. Then stock up on "real" food from the grocer. No daily carrying. Much less headache. Much healthier.