I haven't seen anyone mention non-starchy veges yet, except the vidalia onion. Our toaster oven has a broil setting, and we use it to broil all kinds of veges, especially tomatoes, onions, zucchini, summer squash, portabello mushrooms, and asparagus. You can brush the veges with a little olive oil and sprinkle on some fresh or dried herbs for extra flavor, if you like, but really, no extra oil is needed for things to cook well. We also use the oven to cook vege nuggets and burgers, and I like to broil tofu sprinkled with herbs or marinated with different sauces in it.
Yesterday, I broiled a large portabella, sliced tomatoes, and onion slices. I sprinkled the portabella with fresh cut herbs, layered it with the tomatoes and onions, more herbs, added a slice of low-fat Edam cheese and popped it back under the broiler until the cheese was bubbly and a little brown on top. It was so yummy, and made for a great <100 cal lunch/snack.
Fresh herbs can be expensive, but I grow my own in pots. If you don't have room for a vege garden, you can do this with your kids, and teach them the joys of gardening and growing their own food (what kid doesn't like to dig in the dirt?!). I have a manicured flower garden (came with the house), so I do all of my fruit and vege growing in pots. Besides several types of herbs, I also grow tomatoes, peppers, raspberries, blueberries and cucumbers in large pots, and strawberries and summer squash in 3' diameter plastic wading pools with holes punched in the bottom. It can get pretty hot in Fresno (like the area I live in in L.A., so make sure you keep things watered and in a partially shaded area.
BTW, a great fun thing for kids to make in either a toaster or toaster oven is rainbow toast. Pour a little milk or water into small bowls (I like to use the individual cups of a mini-muffin tin -- no spill!) and add some food coloring to each bowl. You can mix the colors for greater variety. Let your kids use Q-tips or clean water color brushes to paint the bread with milk/food coloring, then pop the bread in the toaster and toast until the unpainted areas are very light brown. The colors in the painted areas become quite vibrant when toasted. My kids loved to do this when they were small, and the milk added a little extra protein and calcium to the bread.