Quick Chicken with bread

3 lbs chicken thighs , boneless and skinless, well-trimmed and cut into 1-inch pieces 2 tablespoons canola oil , divided 1 tablespoon Italian herb seasoning[...]

4 boneless skinless chicken breasts 1 red onion , large sliced thinly 2 zucchini , sliced about 1/2 inch thick 28 ounces diced tomatoes 8 ounces button[...]