In a large pot, combine chicken broth, soy sauce, and sriracha. Bring to a simmer over medium heat.
In a separate skillet, heat vegetable oil over medium-high heat. Add chicken pieces and season with salt and pepper. Cook until browned and cooked through, about 5-7 minutes.
Add minced garlic and grated ginger to the skillet with the chicken. Sauté for 1-2 minutes until fragrant.
Add the cooked chicken mixture to the pot with the broth. Stir to combine.
Add the ramen noodles to the pot and cook according to package instructions, usually about 3-4 minutes.
In a small bowl, whisk together heavy cream and cornstarch mixture. Slowly pour into the pot while stirring. Cook for an additional 2-3 minutes until the sauce thickens.
Taste and adjust seasoning if necessary. Serve hot, garnished with sliced green onions and sesame seeds.