Preheat your oven to 400°F and dice the chicken breast into 1-inch cubes.
Chop the eggplant, zucchini, and red bell pepper into uniform bite-sized pieces.
In a large oven-safe skillet, heat the olive oil over medium-high heat and sear the chicken cubes until golden on all sides.
Add the diced onions and minced garlic to the skillet, sautéing for 2-3 minutes until translucent and fragrant.
Stir in the eggplant, zucchini, bell peppers, tomato puree, dried thyme, and dried oregano.
Season the mixture with sea salt and black pepper, then transfer the skillet directly into the preheated oven.
Roast for 20 minutes, or until the vegetables are tender and the chicken is fully cooked through.
Remove from the oven and garnish with fresh torn basil leaves before serving warm.