Cook ramen noodles according to package instructions (without seasoning packets). Drain and set aside.
Heat oil in a large skillet or wok over medium heat. Season chicken with salt and pepper, cook 5–6 minutes per side until golden and cooked through. Remove and slice.
In the same skillet, sauté garlic until fragrant. Add chili paste and red pepper flakes; cook for 30 seconds.
Pour in chicken broth and heavy cream. Whisk and let simmer 3–4 minutes.
Stir in soy sauce and sesame oil. Adjust seasoning and spice to taste.
Toss cooked noodles into the skillet until fully coated with the sauce.
Divide noodles into bowls, top with sliced chicken, green onions, and optional soft-boiled egg. Serve hot.