01 -
In a large mixing bowl, thoroughly combine ground chuck, bread crumbs, dry mustard, crumbled beef bouillon, Worcestershire sauce, ketchup, salt, and black pepper until a uniform mixture forms.
02 -
Divide the mixture evenly and shape into 8 thin patties for even cooking.
03 -
In a large skillet over medium-high heat, add 30 ml vegetable oil and sear the patties until both sides are well browned. Work in batches if needed to prevent overcrowding.
04 -
Remove browned patties from the pan and set aside. Retain 2 tablespoons of oil in the skillet, discarding excess.
05 -
Add sliced onions to the skillet and cook, stirring occasionally, for several minutes until very soft and translucent.
06 -
Stir in minced garlic and cook for 1 minute, stirring constantly to avoid burning.
07 -
Sprinkle flour over the onions and garlic. Cook and whisk continuously for 1 minute until the flour is lightly browned and fully integrated.
08 -
Gradually add 480 ml beef broth, Worcestershire sauce, ketchup, and kitchen bouquet to the skillet, whisking to blend and smooth out lumps.
09 -
Return the browned patties to the skillet. Cover and simmer over medium-low heat for 20 minutes, stirring occasionally. Add additional beef broth in increments if the gravy becomes overly thick.