I read your blog entry about packed lunches, and I think maybe I don't agree with some of it.
For example that Bon Appetit article -- maybe a little pretentious, but I am going to show it to Alice, because I bet she would get up early to make herself some of those lunch ideas. They actually sound very good for dinner with leftovers for the lunch. Maybe that's why it sounds pretentious -- I seriously doubt anyone really makes those only to pack in a lunch, whereas as a leftover that would be completely reasonable. Miriam even made sushi for dinner a few times for the purpose of taking it in her lunch the next day.
Pesto-Chicken Rolls from Bon Appetit
I don't think that Miriam and Alice's lunches are too far off from the norm, or they would rebel, and yes they often have a piece of candy or a yogurt, but they don't seem all that much worse than what you described you bringing healthwise. For example, today Miriam had a PBJ sandwich, 5 ritz crackers, a bit of candy, a peach, and a chocolate milk (It's not really just her lunch -- she has been eating a little lunch at school and finishing it up the rest for afternoon snack).
Alice had the same crackers and candy, but she had a tortilla wrap with melted swiss cheese for her sandwich, a fruitable for her drink (it is fruit juice with water added), and blueberries for her fruit. This seems to be well within the range. Yes, it has more sugar than you had, but not enormously more.
My own lunch was leftovers from the salad last night for dinner -- quinoa, avocados, tomato, corn cut off the cob, garlic, onion, and the wonderful Cajun seasonings you brought me from Baltimore (which I have been adding to pretty much everything all summer). That is just as pretentious as any Bon Appetit lunch in that article! But this was an exceptional day -- on Tuesday I didn't have time to make a lunch at all and had a pain au chocolat from the coffee shop. And I'm sure that kind of lunch is exactly what Michelle Obama is talking about.