Season the chicken with salt and pepper. Heat vegetable oil in a wok over medium-high heat. Cook chicken for 6-8 minutes until browned and cooked through, then remove from wok.

In the same wok, add diced onion and sauté for 3-4 minutes until softened. Add minced garlic and cook for another minute until fragrant. Add chopped peppers and cook for 2-3 minutes until tender.

In a separate bowl, mix diced tomatoes, chicken broth, soy sauce, honey, rice vinegar, sesame oil, grated ginger, and red pepper flakes to make the sauce.

Pour sauce into the wok over vegetables and simmer. Return cooked chicken to the wok. Break ramen noodles into smaller pieces and stir into the mixture, cooking for 2-3 minutes.

Taste and adjust seasoning. Add half of the ramen flavor packet, more soy sauce or honey if desired. Remove from heat.

Garnish with chopped green onions and sesame seeds. Serve immediately.