Season chicken cutlets with salt and pepper on both sides then dredge in flour and shake off the excess.
Heat a stainless steel pan to medium heat, then add the reserved sun dried tomato oil. Cook the chicken cutlets for 3 minutes per side or until well browned and cooked through. Work in batches if required and do not crowd the pan. Place the cooked chicken onto a plate and tent with foil.
Turn the heat to medium-low and add the garlic to the pan. Cook until fragrant and golden (about 1 minute). Next, add the sun dried tomatoes, cook for 30-60 seconds more, then add the wine and turn heat to high. Using a wooden spoon, scrape the bottom of the pan to dislodge any brown bits.
After 1-2 minutes and once the wine has reduced, add the chicken stock and bring to a simmer. Reduce heat to medium and cook for 3 minutes.
Add the cream, spinach, and Pecorino and cook until the sauce begins to bubble and thicken (about 3-5 minutes).
Add the chicken to the pan. Cook until the chicken is hot and the sauce thoroughly coats the chicken (about 2-3 minutes). Now is the time to taste test the sauce and make final adjustments to salt and pepper.
Once satisfied with the taste, turn off the heat and hand tear the basil leaves on top. Serve with crusty bread to mop up the sauce. Enjoy!