Preheat oven to 425 degrees F. Lightly oil a baking sheet or coat with nonstick spray.
Place broccoli florets, mushrooms, butternut squash, zucchini, squash, bell pepper and onion in a single layer onto the prepared baking sheet. Add olive oil, balsamic vinegar, garlic and thyme; season with salt and pepper, to taste. Gently toss to combine.
Place into oven and bake for 12-15 minutes, or until tender.*
Serve immediately.
Notes
*Baking time may need to be adjusted depending on the thickness of the vegetables.