One-Pot Black Pepper Chicken

Name: One-Pot Black Pepper Chicken
Cuisine: American, Asian
Ingredients: 1-1/2 pounds boneless, skinless chicken breasts, cut into cubes; 1 red bell pepper, seeded and cut into strips; 1-1/2 teaspoons freshly ground black pepper; 1-inch fresh ginger root, peeled and finely chopped; 2 cloves garlic, peeled and finely minced; 3 tablespoons lite soy sauce, divided (optional, coconut aminos, Tamari or Bragg Liquid Aminos); 3 tablespoons white vinegar, divided; 1 tablespoon coconut palm sugar or honey; 2 tablespoons olive oil