Season chicken: Pat dry, then rub with salt, pepper, and paprika.
Sear chicken: Heat 1 tbsp oil in large skillet over medium-high. Cook chicken 5-6 mins per side until golden. Remove and set aside.
Cook veggies: In same skillet, add remaining oil. Sauté mushrooms and shallot 4-5 mins until browned. Add garlic, cook 30 sec until fragrant.
Make sauce: Pour in broth to deglaze, scraping up browned bits. Stir in cream, Parmesan, mustard, thyme, and pepper flakes. Simmer 3-4 mins until slightly thickened.
Finish: Return chicken to skillet, nestling into sauce. Add spinach, cover, and cook 2-3 mins until spinach wilts and chicken reaches 165°F.
Serve garnished with parsley and extra Parmesan. Great with:
Mashed potatoes
Pasta
Crusty bread
Notes
For thinner sauce: Add extra broth 1 tbsp at a time
Vegetarian option: Use chickpeas and vegetable broth
Gluten-free: Ensure all ingredients are GF-certified
Storage: Keeps refrigerated 3 days (sauce may thicken when cold)
Shortcut: Use pre-sliced mushrooms and bagged spinach