1-Step 1: Preheat and Prepare Start by preheating your oven to 425 degrees Fahrenheit. This high temperature is crucial for achieving the caramelization that makes roasted vegetables so irresistible. While the oven heats, line a large baking sheet with parchment paper for easy cleanup, or use a sheet pan directly if you prefer those crispy bits that stick slightly. Make sure your oven rack is positioned in the center for even heat distribution. If you have a convection setting, you can use it, but reduce the temperature to 400°F to account for the more intense heat circulation.

2-Step 2: Prepare the Vegetables and Apple While the oven preheats, prepare your ingredients. For the butternut squash, peel the tough outer skin with a vegetable peeler, scoop out the seeds, and cut the flesh into 1-inch cubes. Uniform sizing ensures even cooking throughout. For the Brussels sprouts, trim the woody ends and slice each sprout in half lengthwise. Remove any loose or yellowed outer leaves. The cut side will get beautifully golden and crispy when it makes contact with the hot pan. Cut your apple into cubes similar in size to the squash pieces. Leave the skin on for added color, fiber, and texture. Jonagold apples are ideal because they soften into a jammy consistency while still holding their shape.

3-Step 3: Season and Toss Spread the cubed butternut squash, apple pieces, and halved Brussels sprouts on your prepared sheet pan. Drizzle with the 2 tablespoons of avocado oil, then sprinkle all the seasonings evenly across the top: 1 teaspoon each of fresh rosemary, garlic powder, and onion powder, plus ½ teaspoon cinnamon and ½ teaspoon salt. Using clean hands or a large spoon, toss everything together until all the vegetables and apple pieces are evenly coated with oil and spices. Spread them out in a single layer, making sure none of the pieces are stacked on top of each other. Crowding the pan will cause steaming instead of roasting.

4-Step 4: Roast to Perfection Place the sheet pan in your preheated oven and bake for 20 minutes. Halfway through cooking, around the 10-minute mark, give everything a stir or flip the pieces with a spatula. This ensures even browning on all sides. The vegetables are done when the butternut squash is fork-tender, the Brussels sprouts have crispy, caramelized edges, and the apples have softened and become slightly jammy. If you want extra crispy Brussels sprouts, you can add 2-3 minutes under the broiler at the end, but watch carefully to prevent burning.

5-Step 5: Finish and Serve Remove the pan from the oven and let it rest for a minute or two. This resting period allows the flavors to settle and makes serving easier. If using, sprinkle the ¼ cup pecans over the top as a garnish for added crunch and nutty flavor. Taste and adjust seasoning if needed, though the recipe is typically well-balanced as written. Serve immediately while hot, or let cool slightly for a warm side dish. This recipe yields 4 servings and pairs beautifully with roasted chicken, pork loin, or stands alone as a vegetarian main when served over grains. For a complete meal, try serving this alongside oven baked chicken legs for a satisfying Sunday dinner that brings the whole family together.