Season chicken with salt and pepper on both sides.
Heat olive oil in a large skillet over medium heat.
Add chicken and cook for 6–7 minutes per side until golden and cooked through. Remove from skillet and set aside.
In the same skillet, sauté garlic for 1 minute.
Pour in chicken broth and heavy cream, stirring to combine.
Add Parmesan cheese and stir until melted and smooth.
Toss in spinach and cook until wilted, about 2–3 minutes.
Return chicken to the skillet, spoon sauce over the top, and simmer for another 3–4 minutes.
Serve hot with garlic toast or a side of rice.