One Pan Skinny Tex Mex Chicken and Zucchini

Name: One Pan Skinny Tex Mex Chicken and Zucchini
Ingredients: 1 tbsp olive oil, extra virgin; 1 large onion, finely chopped; 5 garlic cloves, minced; 2 medium bell peppers, chopped; 1 lb boneless & skinless chicken breasts, cut into 1 pieces; 1 tbsp cumin, divided; 1 tsp salt; 1 tsp ground black pepper; 1 cup corn, frozen or fresh; 14 oz can black beans, drained & rinsed; 14 oz can diced tomatoes; 1 tsp taco (fajita) seasoning, all natural (substitute with cayenne pepper + cumin); 1 large zucchini, diced; 1 cup Tex Mex or Colby Jack cheese, shredded; 1/2 cup green onions, chopped; 1 cup cilantro, chopped