Preheat the oven to 425 degrees F and place a rack in the center of the oven.
Arrange the peppers, carrots, parsnips, broccoli and beets in rows to create a rainbow of colors on a large baking sheet. Scatter the thyme sprigs over the vegetables and drizzle with the oil. Season with salt and pepper. Roast until the vegetables are tender and cooked through, about 30 minutes.
Drizzle the Balsamic Glaze over the vegetables and serve.
In a small saucepan, combine the vinegar and sugar and bring to a boil over high heat. Reduce the heat to a simmer and cook until syrupy and reduced to 1/4 cup, 8 to 10 minutes.