Using a meat tenderizer, pound the meat to an even thickness. Season generously with salt and pepper.
1 pound round steak, 1 tsp kosher salt, 1/2 tsp black pepper
Dredge the cutlets in all-purpose flour.
1/4 cup all-purpose flour
Cut the onion in half longwise, then cut into thin half-moon slices.
1 large yellow onion
Heat one half of the butter in a heavy saucepan or dutch oven. When the butter is sizzling, add a floured cutlet.
2 tbsp butter
Brown each cutlet on both sides, being careful not to crowd the pan. Cook in batches if necessary.
Remove the browned cutlets and set aside.
Add onions and Balsamic vinegar to the pan, then sauté until translucent.
1 tbsp Balsamic vinegar
Add flour, garlic and thyme.
3 cloves garlic, 4 tbsp flour, 2 tsp thyme
Cook for a couple of minutes while stirring to brown the flour.
Add dry red wine to deglaze the pan.
1 cup dry red wine
Scrape up any of the fond and incorporate it into the sauce.
Preheat beef stock in the microwave, then slowly stir it into the sauce.
3 cups beef stock
Add Worcestershire sauce.
1 tbsp Worcestershire Sauce
Add dark soy sauce. This is an optional step that will help to darken the sauce.
1 tsp dark soy sauce
Add the remaining knob of butter. Stir and simmer until the sauce just begins to thicken.
Add the browned cutlets back to the sauce.
Simmer, covered for three hours. Check on it from time to time, stirring and scraping up any bits that have stuck to the bottom of the pan.
Remove the lid, then adjust the seasoning. Add the cayenne pepper, chopped parsley and chopped green onions.
1/8 tsp cayenne pepper, 1/4 cup fresh parsley, 1/4 cup green onions
Serve hot with a ladle of brown gravy and your favorite Southern sides.