Step 1: Preheat the Oven: Preheat the oven to 400F (200C). Ensure the oven rack is positioned in the center for even cooking.
Step 2: Prepare the Vegetables: In a large bowl, combine the quartered red potatoes, red onion wedges, bell pepper pieces, and broccoli florets. Drizzle with olive oil, then sprinkle with Italian seasoning, garlic powder, paprika, salt, and pepper. Toss thoroughly to ensure all vegetables are evenly coated with the oil and seasonings.
Step 3: Arrange on Baking Sheet: Spread the seasoned vegetables in a single layer on a large baking sheet. If the baking sheet is not large enough, use two baking sheets to avoid overcrowding, which can steam the vegetables instead of roasting them.
Step 4: Season the Chicken: Pat the chicken breasts dry with paper towels. Lightly drizzle with olive oil, then sprinkle with salt, pepper, garlic powder, and paprika. Ensure the chicken is evenly coated with the seasonings.
Step 5: Add Chicken to Baking Sheet: Place the seasoned chicken breasts among the vegetables on the baking sheet, spacing them evenly.
Step 6: Bake: Bake for 25-30 minutes, or until the chicken is cooked through and the vegetables are tender. The internal temperature of the chicken should reach 165F (74C).
Step 7: Rest and Serve: Remove the baking sheet from the oven and let the dish rest for 5 minutes before serving. This allows the juices to redistribute, resulting in more tender chicken. Serve immediately with fresh lemon wedges, if desired.
Optional Tips and Substitutions: For a spicier kick, add a pinch of red pepper flakes to the vegetables and chicken. Feel free to substitute other vegetables based on seasonal availability or preference, such as zucchini, Brussels sprouts, or asparagus. For dairy-free, ensure the Italian seasoning blend does not contain any dairy ingredients. If you don't have Italian seasoning, use a mix of dried oregano, basil, thyme, and rosemary. You can also use bone-in, skin-on chicken thighs for a richer flavor.