Prepare Ingredients: Finely chop onion and gather all ingredients for mixing.

Mix Components: Combine ground beef, onion, breadcrumbs, eggs, mustard, salt, and pepper in a bowl and knead until combined.

Shape Patties: Wet hands and shape mixture into patties about one inch thick.

Cook Patties: Heat skillet and cook patties for 5-7 minutes per side until golden brown.

Drain Oil: Transfer cooked patties to a paper towel-lined plate to absorb excess oil.

Serve: Enjoy with sides like mashed potatoes or sauerkraut.