Season the chicken thighs with salt and pepper on both sides. Coat
in flour.
Heat butter and olive oil in a large frying pan over medium-high
heat. Add the chicken thighs and cook until golden brown on both
sides and cooked through, about 6-7 minutes per side. Remove the
chicken from the skillet and set aside.
In the same pan, add red pepper flakes, oregano, thyme and minced
garlic . Cook for about 30 seconds until fragrant. Add tomato
paste and Dijon mustard, cook another 30 seconds.
Pour in the chicken stock to deglaze and scrape up any browned
bits from the bottom of the skillet
Stir in the heavy cream, sun-dried tomatoes, and chopped spinach,
lemon zest and chopped spinach. Let the sauce simmer for 2-3
minutes until slightly thickened.
Then add ½ cup of the grated Parmesan cheese, mix well.
Return the chicken to the pan with any juices, mix well and spoon
some of the sauce over the top. Let the chicken simmer very gently
in the sauce for another 2-3 minutes until heated through. Taste
for seasoning, add salt and pepper to taste. Add shredded basil
leaves.