Baked Vegetable Bird's Nests are loaded with zucchini, carrots, onion, and baby spinach. The carrots and zucchini are julienned and then combined with sliced onion and baby spinach to form these cute little vegetable bird's nests, then baked until golden and crispy. Tasty vegetable-filled bird's nests are not only very appealing and colorful, but they're also ideal to serve as a festive appetizer!