Italian Chicken Skillet

Name: Italian Chicken Skillet
Ingredients: 2 tbsp. extra-virgin olive oil; 1 lb. boneless skinless chicken breasts; kosher salt; Freshly ground black pepper; 1/2 onion, thinly sliced; 2 bell peppers, thinly sliced; 2 medium zucchini, sliced into half moons; 2 cloves garlic, minced; 1/2 tsp. dried oregano; 1 c. chicken broth; 1 (14 oz.) can crushed tomatoes; 1/4 c. fresh basil, torn