Mix the spices in a small bowl. Coat chicken evenly with the spice blend.
Heat avocado oil in a skillet over medium-high heat. Sear chicken for 3-4 minutes per side until golden. Remove and let rest.
Discard excess oil. Deglaze the pan with white wine or broth, scraping up the browned bits.
Add heavy cream, Boursin cheese, half the Parmesan, and sun-dried tomatoes. Stir until smooth and bubbly.
Lower the heat, stir in basil leaves, and return chicken to the pan. Spoon sauce over chicken and heat through.
Serve topped with the remaining Parmesan, either plated or directly from the pan.