Chicken with Spinach and Mushrooms in Creamy Parmesan Sauce

Season the chicken breasts with salt and pepper.
Heat olive oil in a large skillet over medium-high heat. Add the chicken breasts and cook for 5-7 minutes on each side, or until golden brown and cooked through. Remove from the skillet and set aside.
In the same skillet, add the chopped onion and sauté for 3-4 minutes until softened. Add the minced garlic and cook for another 1-2 minutes.
Add the sliced mushrooms and cook for 5 minutes until they start to brown.
Stir in the fresh spinach and cook until wilted.
Pour in the heavy cream and chicken broth, bringing the mixture to a simmer.