Cook the pasta following the instructions on the package. Once done, drain and save 1 cup of the pasta water for later.
While the pasta cooks, heat a little oil in a large frying pan over medium-high heat.
Add the chicken to the pan and sprinkle with Cajun spice and black pepper. Stir to coat, then cook for about 5 minutes until the chicken is mostly cooked.
Crumble in the stock cube and mix it with the chicken.
Add the garlic, onion, red and yellow bell peppers, and sliced jalapenos to the pan. Cook for another 5 minutes, stirring frequently, until the onion softens slightly.
Stir in the spring onions, hot sauce, Worcestershire sauce, cider vinegar, cream, and parmesan. Bring to a gentle simmer and cook for 4-5 minutes, until the chicken is fully cooked.
Add the cooked pasta to the pan, stirring to combine. If the sauce feels too thick, add a splash of the reserved pasta water to loosen it.
Serve in bowls, topped with extra jalapeno slices if you like a bit more heat!