I start by rubbing Cajun seasoning generously onto both sides of the chicken breasts. I let it sit while I chop my veggies so the flavors soak in nicely. This little step makes the chicken so much more flavorful when cooked.
I heat oil in my skillet and cook the chicken for about 4–5 minutes per side until golden brown. Once cooked, I take it out, cover it with foil, and let it rest. This keeps it juicy and easy to slice later.
Without cleaning the skillet (because those brown bits are packed with flavor), I toss in the zucchini, bell pepper, and jalapeño. I cook them until tender yet crisp, about 7 minutes, letting them absorb that savory chicken flavor.
Next, I stir in tomato paste, diced tomatoes, garlic, and crushed red pepper flakes. I let everything simmer together for 5 minutes so the flavors can meld beautifully. Meanwhile, I boil the pasta in salted water until al dente.
I lower the heat and pour in the half and half, stirring constantly for about 6–7 minutes as the sauce thickens. Then, I add Parmesan cheese and season with salt and pepper. The sauce turns silky, rich, and full of flavor.
I drain the pasta, saving some pasta water, and toss it right into the skillet. I stir everything until the pasta is coated. If the sauce feels too thick, I add a splash of pasta water until it’s just right.
Finally, I slice the rested chicken into strips and place it beautifully over the pasta. I garnish with green onions, more Parmesan, and a sprinkle of red pepper flakes. It looks amazing and tastes even better.