In a large pot of boiling salted water, cook the penne pasta according to package directions until al dente. Drain and set aside.
Season the sliced chicken breasts with salt and pepper. In a large skillet, heat the olive oil over medium heat. Add the chicken slices and cook until golden brown and cooked through, about 5-7 minutes. Remove from the skillet and set aside.
In the same skillet, add the minced garlic and sun-dried tomatoes. Sauté for about 2 minutes until fragrant.
Pour in the heavy cream, stirring to combine. Let it simmer for 2-3 minutes until slightly thickened.
Add the cooked pasta and sautéed chicken back into the skillet. Stir in the fresh spinach and let it wilt (around 1-2 minutes).
Stir in the grated Parmesan cheese until melted and incorporated. Adjust seasoning with salt and pepper to taste.
Spoon the pasta onto plates or into bowls and garnish with fresh basil leaves.
Notes
Feel free to add more vegetables or adjust the seasoning to your taste.