Chicken and Pepper Kebabs

Name: Chicken and Pepper Kebabs
Ingredients: 1/4 cup soy sauce; 1 tablespoon sesame oil; 2 teaspoons Chinese five-spice powder; 2 cloves garlic, minced; 1/2 teaspoon crushed red pepper; 1/4 cup vegetable oil $; 1 tablespoon chopped fresh cilantro, optional; 1 1/2 pounds bone-in chicken breast, skin and bone removed, cut into 1-inch pieces; 1 medium red onion, cut into 8 wedges; 3 green bell peppers, seeded, cut into 1-inch squares $; 1/2 red bell pepper, seeded, cut into 1-inch squares $