Hi there
I truly believe that *anything* can be "quick and easy" if you plan for it (and have the right storage containers

).
If you have 30 minutes to an hour where you can be in your kitchen some nights of the week or weekend, you can have plenty of choices to grab during the day.
I make egg muffins for DH twice a week. I take a muffin tin and add egg beaters and cheese (and veggies if I am eating them) and bake at 350 until they are cooked. Then, DH just pops them in the microwave every morning for 30 seconds.
I will also make DH's lunch casseroles every Sunday night (my lunches are provided) and put them in storage containers. DH grabs them out of the freezer when he makes his lunch. The same thing goes for our salad greens. We save a ton of $$ by buying heads of lettuce instead of bags. I invested in a $10 salad spinner and store our greens in there (I need to replace every 3 days or so and it takes about 10 minutes to chop, wash, and spin). DH puts the greens in a ziplock bag and keeps his dressing in a small container as well as at his office.
Other snack ideas:
Veggies are GREAT for prepping and pulling out when you want them. Make some hummus (or buy some) and you've got a very filling snack. This is actually my lunch many days. It's easy to prepare and I'm amazed at how filling it is and it gives me so much energy to get through the rest of my day.
-Laughing cow with veggies or crackers
-string cheese and some fruit
-I'm on a soup kick right now, so I make a huge batch and store it. It's easy just to grab a single serving and it's a very filling mini-meal.
-I also make green smoothies for breakfast- spinach with frozen fruit and oj and seltzer- pretty simple (and fast).
That's all I've got for right now. As I said, if you're willing to devote a little time before hand to planning, you can make it work even with a crazy schedule. I've done it!