01 -
Heat the oven to 375°F (190°C).
02 -
Warm olive oil in a large skillet over medium heat. Add chopped onion and minced garlic; sauté for 2 to 3 minutes until onions become translucent.
03 -
Add sliced zucchini, diced eggplant, and chopped bell pepper to the skillet. Cook, stirring occasionally, for 5 to 7 minutes until vegetables soften.
04 -
Season the vegetables with dried thyme, oregano, salt, and black pepper. Stir in diced tomatoes and simmer the mixture for 5 minutes.
05 -
Place chicken breasts evenly in a large baking dish. Pour the vegetable and tomato mixture over the chicken, distributing it uniformly.
06 -
Cover the dish with aluminum foil and bake for 25 minutes.
07 -
Remove the foil, sprinkle shredded mozzarella cheese evenly on top, then bake uncovered for an additional 10 to 15 minutes until the chicken reaches an internal temperature of 165°F (75°C) and the cheese is bubbling and golden.
08 -
Top with fresh basil leaves before serving.