I would describe myself as an "ex-athlete", having done athletics for the bulk of my years up until age 18, culminating in very demanding training for my crew team (3+ hour cardio sessions and weights). After that, I decided not to pursue rowing in college, deciding to focus on academics. The last two years I played soccer and lifted weights fairly frequently, and stayed in reasonably good shape.
This academic year, however, I have decided to take my studies a lot more seriously and apply for a PhD program in the fall. As a result, I spend an average of 10-15 hours studying per day in the library, during which I have almost no access to healthy food. The only convenient place to get food during these hours is from the Café adjoining the Library which has generally unhealthy snacks. I can't cook in my apartment because it takes too much time, and because of a room-mate, my kitchen is unsanitary.
I have a schedule of working out for ~1.5 hours in the mornings 5 or 6 days a week, which I stick to barring illness. My main concern is the "kitchen" aspect of my fitness: although snacks and supplements are not good substitutes for healthy cooked meals, is there anything I can do to substitute (as best as possible) cooked meals during my long days?