I think I shed a tear. You passed up steak for grapes?

steak is along the lines of eggs. Solid fat and protein sources, with a good amount of cholestorel (don't think of it as bad. It has several beneficial functions, one of which is it being broken down into testosterone). Grapes are fruit and better than many food out there, but to pass up protein and fat for solely grapes isn't the best call. Don't sweat it, just remember next time. Also, avoid sauces as much as possible, same issue with the dressings.
At the school lunch, load down as many veggies as they'll let you get. Get a bang for your buck. Also, bring in a can of tuna if you can to mix in with the salad. If you leave a lot of the water in it when you mix it in, you can help fight the dryness of the veggies without turning to dressings.
Avoid the spaghetterz, all starch, and usually overloaded with tomato sauce.
Rice is the same problem, starch overdose.
Aim for something like grilled chicken, or the like. I work at McDonald's, so my choices are limited to chicken salads and milk. You have the benefit of working at a sitdown restaurant, so it's much more likely the quality if food is better.
What are the main options you have at your work?