Preheat your oven to 400°F.
Dice the chicken breast, zucchini, eggplant, and red bell pepper into uniform 1-inch cubes.
On a large sheet pan, toss the chicken and vegetables with olive oil, dried oregano, sea salt, and black pepper until evenly coated.
Roast in the oven for 20 minutes until the chicken is cooked through and the vegetables are tender and slightly caramelized.
While the mixture roasts, combine the tomato puree and minced garlic in a small saucepan over medium heat, simmering for 5 minutes.
Transfer the roasted chicken and vegetables into a bowl, fold in the warm tomato sauce, and garnish with fresh basil before serving.