1tablespoonButterFor sautéing vegetables and enriching gravy.
1smallOnionFinely chopped, about 1 cup.
8ozMushroomsSliced, cremini or button work well.
2tablespoonsAll-purpose flourTo thicken the gravy.
2cupsBeef brothLow-sodium preferred for better control of salt.
Instructions
In a large bowl, combine the ground beef, breadcrumbs, milk, egg, Worcestershire sauce, Dijon mustard, onion powder, garlic powder, salt, and pepper. Mix gently until just combined, then form into four oval-shaped patties.
Heat olive oil in a skillet over medium heat. Add the patties and cook for 4-5 minutes per side until browned and cooked through. Transfer to a plate.
In the same skillet, reduce heat to medium-low and add butter. Once melted, add onions and mushrooms. Sauté until soft and beginning to brown, about 6-7 minutes.
Sprinkle flour over the vegetables and cook for 1 minute. Slowly whisk in beef broth and Worcestershire sauce. Bring to a simmer and cook until gravy thickens, about 4-5 minutes.
Return patties to the skillet, spoon gravy over them, and simmer gently for another 5 minutes. Serve hot over mashed potatoes, rice, or buttered noodles.
Notes
Store leftovers in an airtight container for up to 3-4 days. Freeze for up to 2 months.