Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cut the chicken breast, eggplant, zucchini, and red bell pepper into uniform 1-inch cubes to ensure even cooking.
In a large mixing bowl, toss the diced chicken and vegetables with olive oil, minced garlic, sea salt, black pepper, and herbes de Provence until well coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the pieces aren't overcrowded.
Roast for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender and slightly caramelized at the edges.
Transfer the roasted chicken and vegetables into a large skillet over medium heat.
Pour in the tomato puree and stir gently, simmering for 3-5 minutes to allow the flavors to meld together beautifully.
Remove from heat and garnish with freshly chopped parsley before serving.