Give chicken a more even cook time by pounding out to an even thickness by using a mallet or backside of a spoon. Season with salt and pepper.
Generously spray a large skillet with cooking spray and heat over medium-high. Add chicken and cook for 4-5 minutes, until golden on both sides and no longer pink in the center. If chicken begins to stick, spray pan again. Remove from skillet and cover to keep warm.
Using same skillet, melt butter over medium. Mince garlic and quarter artichoke pieces.
Add garlic and flour to melted butter. Cook for 30 seconds while whisking. Add spinach and and artichoke. Saute for 1 minute.
Pour in milk slowly while whisking and scraping the pan to remove any brown bits.
Add cream cheese and Parmesan cheese. Mix and cook until melted. Add chicken back to the skillet; heat through. Season with salt and pepper, to taste.