Step 1

Preheat oven to 375°F (190°C). Lightly grease a baking dish.

Step 2

Sear the chicken: Heat olive oil in a large skillet over medium-high heat. Sear chicken for 2–3 minutes per side until golden. Set aside.

Step 3

Sauté veggies: In the same skillet, add onion and garlic. Cook for 1–2 minutes until fragrant. Add mushrooms and sauté until browned.

Step 4

Wilt the spinach: Stir spinach into the mushroom mixture and cook just until wilted.

Step 5

Make the sauce: Pour in heavy cream, stir to combine, and simmer for 1–2 minutes. Add a handful of shredded cheese if you want it extra creamy.

Step 6

Assemble: Layer spinach-mushroom mixture in the baking dish. Place seared chicken on top. Pour sauce over the chicken evenly.

Step 7

Top with remaining shredded mozzarella and Parmesan cheese.

Step 8

Bake uncovered for 25–30 minutes until bubbly and chicken reaches 165°F (74°C).

Step 9

Rest for 5 minutes before serving. Garnish with extra Parmesan or fresh herbs if desired!