Pretty and delicious green bean side dish

This has been my favorite side dish this summer. It's pretty, colorful, and delicious. Thanks to frozen beans and year-round availability of grape tomatoes, you can make it year round.

1 bag frozen whole green beans, steam-in-the-bag variety
about 1/2 cup grape or cherry tomatoes, halved
Italian dressing or vinaigrette (I love the new Kraft Tuscan Italian)
Finely minced garlic or thinly sliced purple onion, optional

Steam beans in microwave according to directions. Place in a wide, shallow bowl, and top with halved tomatoes (and garlic/onions if using). Add a little dressing, just enough to coat, and toss. Add more dressing as needed. Best if allowed to sit at room temperature for 15 to 30 minutes.