Make the patties: In a large bowl, mix all patty ingredients together. Form into patties like you’re building little flavor frisbees.
Sear ‘em up: Heat a large skillet over medium-high heat with some oil and brown the patties on both sides. You’re not cooking them all the way through—just giving them a Maillard moment. Remove and set aside.
Sauté the onions: In the same skillet, toss in the sliced onions and cook until soft and caramelized. (We love a one-pan moment.)
Deglaze & build flavor: Add a splash of water to lift all that browned goodness from the pan, then stir in butter, parsley, garlic powder, and minced garlic. Let it get fragrant.
Gravy time: Sprinkle in the flour and stir until everything looks pasty and suspicious. Slowly pour in the water while whisking, then add beef bouillon, Worcestershire sauce, and stewed tomatoes (break ‘em up with your spoon if they’re chunky).
Bring it together: Let the gravy simmer and thicken for a few minutes, then return the burger patties to the skillet. Spoon some gravy over top and let it all bubble gently until everything is thick, rich, and fully cooked.
Serve hot: Ladle that gravy over mashed potatoes, toss some bombshell green beans on the side, and mentally prepare for everyone at the table to fall in love with you.