In a medium-sized mixing bowl, combine the sliced chicken breasts with soy sauce, sesame oil, minced ginger, and minced garlic. Toss well to coat the chicken evenly. Allow it to marinate for at least 15 minutes to absorb the flavors.
In a large pot, bring the chicken broth to a gentle simmer. Add the creamy peanut butter, sriracha, and honey to the pot, whisking continuously until all ingredients are fully blended and the sauce is smooth and creamy. Once combined, remove from heat and set aside.
Bring a separate pot of water to a boil. Cook the ramen noodles according to package instructions, approximately 4-5 minutes, until they are al dente. Drain the noodles and set aside.
In a large skillet over medium heat, add the marinated chicken. Cook for about 5-7 minutes, stirring occasionally, until the chicken is fully cooked through and has developed a nice golden color.
Incorporate the broccoli florets and thinly sliced red bell pepper into the skillet with the cooked chicken. Stir-fry everything together for an additional 3-4 minutes, until the vegetables are tender yet still crisp.
Pour the prepared peanut sauce into the skillet, mixing well to coat the chicken and vegetables evenly. Let it simmer together for about 2 minutes to blend the flavors.
Gently add the cooked ramen noodles to the skillet, tossing everything together until the noodles are well integrated with the peanut sauce and heated through, approximately 1-2 minutes.
Spoon the spicy peanut chicken ramen into bowls and garnish each serving with chopped green onions, a sprinkle of crushed peanuts, and fresh cilantro leaves for an added burst of flavor and color.