First, preheat the oven to 400°F (200°C).
Cut the chicken into cubes and chop the vegetables.
Toss everything with olive oil and vegetables.
Now, spread the mixture across a baking sheet.
Roast everything for 25 to 30 minutes. Meanwhile, flip them in the middle.
In the last 10 minutes, add the mushrooms.
Garnish the chicken and veggies with herbs or cheese, and serve.