Step 1: Preheat Oven and Prepare Baking Sheet: Preheat the oven to 400F (200C). Line a large baking sheet with parchment paper for easy cleanup.
Step 2: Prepare the Chicken: Pat the chicken breasts dry with paper towels. This helps them to brown nicely in the oven. In a small bowl, mix together Italian seasoning, garlic powder, paprika, salt, and black pepper. Sprinkle the mixture evenly over both sides of the chicken breasts, pressing lightly to adhere.
Step 3: Prepare the Vegetables: In a large bowl, combine the bell peppers, zucchini, red onion, and cherry tomatoes. Drizzle with olive oil and toss to coat evenly. Ensure the vegetables are well coated to prevent them from drying out during roasting.
Step 4: Arrange on Baking Sheet: Arrange the vegetables in a single layer on the prepared baking sheet. Place the seasoned chicken breasts among the vegetables, ensuring they are not overcrowded. Overcrowding can lead to steaming instead of roasting.
Step 5: Bake: Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through and the vegetables are tender. Chicken is cooked when it reaches an internal temperature of 165F (74C). Use a meat thermometer to check for doneness.
Step 6: Rest and Garnish (Optional): Remove the baking sheet from the oven and let the chicken and vegetables rest for 5 minutes before serving. Garnish with fresh parsley, if desired, for added color and freshness.
Tips and Substitutions: For a spicier dish, add a pinch of red pepper flakes to the seasoning mix. Feel free to substitute any vegetables based on preference or seasonal availability. Broccoli, asparagus, or Brussels sprouts would also work well. To add a touch of acidity, squeeze fresh lemon juice over the chicken and vegetables before serving. If you don't have Italian seasoning, use a combination of dried oregano, basil, and thyme. You can also marinate the chicken for 30 minutes before baking for added flavor.