1Split chicken breasts in half and season with avocado oil and plenty of seasoning. Sear in a hot skillet until golden brown, then baste with butter.
2In the same skillet, sauté onions and garlic in butter until fragrant. Add flour and deglaze with chicken broth. Stir in heavy cream and cheeses until melted.
3Cook pasta according to package directions. Then add the pasta, spinach, more seasoning, broccoli and chicken to the cream sauce and mix well.
4Transfer the mixture to a baking dish, top with remaining chicken and cheese, and bake at 375°F for about 25 minutes until golden brown and bubbly.