Preheat your oven to 400°F (200°C).
Dice the eggplant, zucchini, red bell pepper, and yellow onion into uniform half-inch cubes.
Place the vegetables on a large parchment-lined baking sheet and toss with half of the olive oil, half of the sea salt, half of the black pepper, and all of the herbes de Provence.
Season the chicken breast with the remaining olive oil, salt, and pepper, then place it on the baking sheet alongside the vegetables.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly caramelized.
While the tray is roasting, add the crushed tomatoes and minced garlic to a small saucepan over medium-low heat and simmer gently for 10 minutes.
Once roasted, slice the chicken into thin strips.
Stir the roasted vegetables into the warm tomato sauce, plate the chicken on top, and garnish with freshly torn basil.