01 - Preheat oven to 425°F. Ensure oven is fully heated for optimal caramelization.
02 - Slice carrots diagonally into 1/4 inch pieces, chop apples into 1/2 inch cubes, dice onion into 1/2 inch pieces, and finely chop garlic.
03 - In a large bowl, whisk together olive oil or aquafaba, maple syrup, Dijon mustard, salt, black pepper, and thyme until well combined.
04 - Add carrots, apples, onion, and garlic to the bowl, tossing thoroughly to evenly coat all pieces with the glaze.
05 - Arrange the coated mixture in a single layer on a metal baking sheet, avoiding overcrowding for even roasting.
06 - Roast for 15 minutes, then use a spatula to turn the mixture and roast for an additional 10 to 15 minutes, until vegetables are tender and edges are caramelized.