Bring salted water to a boil and add the penne. Cook until al dente. Drain the pasta but set aside about a cup of pasta water — you’ll use it to adjust the sauce later.
Cut chicken breasts into bite-sized pieces. Season lightly with salt and ¼ teaspoon pepper. This gives even seasoning in every bite.
Heat 2 tablespoons of olive oil in the skillet. Add the chicken in a single layer and cook until golden. This quick sear adds delicious flavor. Remove the chicken and set aside.
Add the remaining oil and minced garlic. Cook for about 30 seconds until fragrant. Be careful not to brown it too much, or it may turn bitter.
Pour in the heavy cream and add a pinch of salt and pepper. Let it simmer until slightly thickened, stirring occasionally so it doesn’t scorch.
Add spinach and sun-dried tomatoes. The spinach will wilt quickly, adding vibrant color and texture, while the tomatoes offer a chewy, tangy contrast.
Turn off the heat and stir in Parmesan and nutmeg. Add a splash of reserved pasta water if the sauce becomes too thick. Adjust seasoning as needed.
Return the cooked chicken to the pan and add the drained pasta. Toss everything together until the sauce coats each piece perfectly.
Finish with fresh basil for a bright, fragrant touch. Serve warm and enjoy the creamy goodness.