Step 1: Prepare the Oven and Baking Dish: Preheat the oven to 400F (200C). Lightly grease a large baking dish or roasting pan.
Step 2: Prepare the Vegetables: In a large bowl, combine the quartered red potatoes, red onion wedges, sliced carrots, and chopped bell peppers. Add the minced garlic, olive oil, rosemary, lemon juice, lemon zest, salt, and pepper. Toss everything together until the vegetables are evenly coated.
Step 3: Arrange Vegetables in Baking Dish: Spread the seasoned vegetables in a single layer across the prepared baking dish, ensuring even distribution.
Step 4: Place Chicken on Top: Arrange the chicken breasts on top of the vegetables, spacing them evenly. This allows the chicken to bake alongside the vegetables and absorb the flavors.
Step 5: Bake the Dish: Place the baking dish in the preheated oven and bake for 35-40 minutes, or until the chicken is cooked through and the vegetables are tender. The internal temperature of the chicken should reach 165F (74C).
Step 6: Rest and Serve: Once cooked, remove the baking dish from the oven and let it rest for 5 minutes before serving. This allows the juices to redistribute within the chicken, resulting in a more tender and flavorful dish. Serve directly from the baking dish for easy cleanup.
Tips and Substitutions: For added flavor, marinate the chicken in the lemon juice, rosemary, garlic, salt, and pepper for at least 30 minutes before baking. Substitute vegetables based on preference or availability; broccoli, zucchini, or asparagus work well. For a spicier dish, add a pinch of red pepper flakes.