1. 1. Preheat Your Oven and Prepare the Pan: Start by preheating your oven to 400 F (200 C). Line a large baking sheet with parchment paper. This step is crucial for easy cleanup and prevents sticking. If you don’t have parchment paper, aluminum foil works too, but parchment paper is generally preferred for less sticking.

2. 2. Chop Your Chicken and Vegetables: Cut the boneless, skinless chicken breasts into roughly 1-inch cubes. Quarter the small red potatoes. Cut the broccoli into bite-sized florets, deseed and cut the bell peppers into 1-inch pieces, and slice the red onion into wedges. Aim for uniform sizes to ensure everything cooks evenly.

3. 3. Combine Ingredients in a Large Bowl: In a large mixing bowl, combine the cubed chicken, quartered potatoes, broccoli florets, bell pepper pieces, and red onion wedges. Make sure there’s enough room to toss everything thoroughly.

4. 4. Season Everything Evenly: Drizzle the olive oil over the chicken and vegetables in the bowl. Sprinkle with Italian seasoning, garlic powder, paprika, salt, and black pepper. Use your hands or a large spoon to toss everything together until all the chicken and vegetables are well coated with the oil and seasonings. This ensures every bite is flavorful.

5. 5. Spread Onto the Baking Sheet: Transfer the seasoned chicken and vegetables onto the prepared baking sheet. Spread them out in a single layer, making sure not to overcrowd the pan. Overcrowding can steam the ingredients instead of roasting them, leading to less crispy results. If necessary, use two baking sheets.

6. 6. Bake Until Cooked Through: Place the baking sheet in the preheated oven and bake for 25-30 minutes. Halfway through the cooking time (around 12-15 minutes), gently toss the chicken and vegetables to promote even browning and cooking. The chicken should be cooked through with no pink in the center (internal temperature of 165 F or 74 C), and the vegetables should be tender-crisp and slightly caramelized.

7. 7. Serve Immediately: Once cooked, remove the baking sheet from the oven. Garnish with fresh chopped parsley, if desired, for a pop of color and freshness. Serve hot and enjoy your delicious one-pan meal!