In a small bowl combine onion powder, garlic powder, black pepper, paprika and salt, then season the chicken breasts with it evenly.
In a large skillet heat 2 tbsp. oil over medium-high heat. Cook chicken breasts for 8 minutes per side or until cooked through & golden brown. Transfer to a large plate. Keep aside.
Por the remaining 2 tbsp. oil into the skillet, add the chopped garlic and fry until fragrant, about 30 seconds. Add the sun dried tomatoes and fry for another 2 minutes, the stir in Dijon.
Add the heavy cream, season with salt and pepper and reduce the heat to low. Bring to a simmer.
Add the spinach, cover with the lid and allow to wilt, then stir in the grated Pecorino Romano cheese/Parmesan. Cook for 1-2 minutes to allow cheese to melt in the sauce.
Return the chicken breasts back to the skillet, garnish with parsley.
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