Stir breadcrumbs and milk in a bowl; let them hydrate for 3 minutes.
Mix in beaten egg, Worcestershire, ketchup, Dijon, garlic, onion powder, salt, and pepper.
Add ground beef and gently combine. Shape four oval patties, about 3/4 inch thick.
Heat olive oil in a large skillet over medium-high heat.
Brown patties 3–4 minutes per side. Transfer to a plate.
Add butter and onions to the skillet. Cook until deep golden, 8–10 minutes.
Sprinkle flour over onions and cook 1 minute, stirring constantly.
Whisk in beef broth, Worcestershire, and thyme. Simmer until the gravy thickens.
Nestle patties into the gravy. Simmer 6–8 minutes until cooked through.
Taste and adjust salt and pepper. Garnish with parsley and serve.
Notes
Try adding sliced mushrooms with the onions for a hearty mushroom-onion gravy. Serve over mashed potatoes, buttered egg noodles, or rice. Leftovers keep 3 days in the fridge; reheat gently with a splash of broth.This recipe is an original creation inspired by classic Salisbury Steak with Gravy Recipe flavors. All ingredient ratios and instructions are independently developed.