Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
In a large bowl, toss the cubed eggplant, zucchini, and red bell peppers with 0.25 tablespoons of olive oil and the herbes de Provence until well coated.
Spread the vegetables in a single layer on the prepared baking sheet and roast for 20 minutes until they are tender and beautifully caramelized.
While the vegetables are roasting, heat the remaining 0.25 tablespoons of olive oil in a large skillet over medium-high heat.
Season the chicken breast cubes with sea salt and black pepper, then add them to the skillet and sauté until golden brown and cooked through.
Stir the minced garlic into the skillet and cook for about 1 minute until the fragrant aroma is released.
Pour in the tomato puree and reduce the heat to low, simmering for 5 minutes to allow the flavors to meld together.
Gently fold the roasted vegetables into the skillet with the chicken and sauce, stirring to combine.
Garnish the dish with fresh chopped basil and serve immediately for a clean and satisfying meal.