Preheat your oven to 400°F. While it’s heating, wash and cut the broccoli and cauliflower into florets, peel and slice the carrots, and get the chicken ready. This prep step ensures even cooking and maximum flavor.
Place the chicken breasts, broccoli, cauliflower, and carrots in a large baking dish. Drizzle olive oil over everything, sprinkle black pepper, and toss to coat. I find this step crucial to getting the seasoning evenly distributed.
Bake the chicken and vegetables for 20-25 minutes until the chicken is cooked through and the veggies are tender but still crisp. I usually check with a fork to ensure the vegetables retain some bite.
Remove the dish from the oven, pour sweet chili sauce over the chicken and veggies, and toss to coat everything evenly. The sauce adds that perfect balance of sweet and mild heat.
Return the dish to the oven and bake for another 5-10 minutes until everything is heated through and fully coated. I love how the sauce caramelizes slightly, giving extra depth to the flavors.
Once done, serve immediately while hot. The combination of colors, aroma, and flavors makes it irresistible straight from the oven.