First, thanks all! There are definitely some edible items in your posts, and the advice is fantastic. I can't wait until I have my property and can plant and get chickens for the eggs. Then I'll be back for more advice on tent/camping style cooking.
Perhaps I should clarify: right now I'm only interested in the current situation, which is that I and all my worldly goods are crammed in my Honda Fit. So no space to store stuff at all. Not even a knife/cutting board etc.
I live in Hawaii so have access to fruit - that one is doable.
The parks here have no electricity. A few of them have grills and picnic tables, but I'm reluctant to wash dishes in public. These are very popular beach parks, so there are people at them until just before they close them at night. No over night parking allowed either, by the way.
Steak and potato on the grill? That might work.
Also, what about hot coffee? Lately I've been doing the mcdonalds free refill coffee, but would rather find a cheaper method if possible.