Add the white wine to deglaze the pan.
When the wine is simmering, use a wooden spoon to scrape all the golden chicken bits from the pan.
Add tomatoes and garlic and cook until the tomatoes soften slightly, about 2 minutes.
Add cream and bring mixture back to a simmer.
Add Parmesan and stir until the cheese melts.
Season sauce with salt and pepper and stir in the red pepper flakes.
Turn off heat and add in the cooked penne and the baby spinach.
Toss until the pasta is evenly coated in sauce and the spinach has wilted slightly. Serve immediately.