1. Season the beef with the black pepper and thyme.
2. Spray a 10-inch nonstick skillet with the cooking spray and heat over medium-high heat for 1 minute. Add the beef and onion and cook the beef for 10 minutes for rare or to desired doneness. Remove the beef and onion from the skillet and keep warm.
3. Add the stock, wine and cherries to the skillet. Reduce the heat to medium. Cook for 10 minutes or until the sauce is reduced to about 1 1/2 cups. Stir in the butter. Serve the sauce with the beef. Sprinkle with the cheese.