Step 1: Preheat Your Oven - Start by preheating your oven to 425°F (220°C). This high temperature is essential for achieving that perfect caramelization on your vegetables.
Step 2: Prepare the Vegetables - Wash and chop all your vegetables into bite-sized pieces. Try to keep the sizes uniform for even cooking.
Step 3: Make the Marinade - In a mixing bowl, whisk together the extra-virgin olive oil, Dijon mustard, Italian seasoning, kosher salt, garlic powder, and black pepper. This mixture will serve as the flavorful coating for your vegetables.
Step 4: Toss the Vegetables - Add the chopped vegetables to the bowl with the marinade. Toss them until they are evenly coated in the flavorful mixture.
Step 5: Arrange on the Baking Sheet - Spread the coated vegetables in a single layer on the baking sheet. Avoid overcrowding, as this can lead to steaming instead of roasting.
Step 6: Roast in the Oven - Place the baking sheet in the preheated oven and roast for about 25-30 minutes. Halfway through, give the vegetables a good stir to ensure even cooking.
Step 7: Add Parmesan Cheese (Optional) - If you're using Parmesan cheese, sprinkle it over the vegetables in the last 5 minutes of roasting. This will give them a delicious cheesy crust.
Step 8: Serve and Enjoy! - Once the vegetables are tender and slightly caramelized, remove them from the oven. Serve hot as a side dish or toss them into salads, grain bowls, or pasta dishes for added flavor and nutrition.
