Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Cut the chicken breast into 1-inch cubes and place them in a large mixing bowl.
Cube the eggplant, slice the zucchini into half-moons, and chop the red bell pepper into bite-sized pieces.
Add the prepared vegetables and cherry tomatoes to the bowl with the chicken cubes.
Drizzle the mixture with extra virgin olive oil and add the minced garlic, dried oregano, sea salt, and black pepper.
Toss everything together thoroughly until the chicken and vegetables are evenly coated in the oil and seasonings.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the pieces are not overcrowded.
Roast for 20 to 25 minutes until the chicken is cooked through and the vegetables are tender and slightly caramelized.
Remove from the oven and finish the dish with a sprinkle of fresh lemon zest and torn basil leaves before serving.