Ingredients
·
3 tablespoons butter
·
5 onions, 4 thinly sliced and 1 peeled
·
1 bay leaf
·
Sea salt and pepper
·
1/2 teaspoon ground thyme
·
1 cup beef consommé
·
1 1/2 cups sour cream
·
2 pounds ground beef sirloin
·
About 1/4 cup Worcestershire
sauce (eyeball it)
·
A handful flat-leaf parsley, finely chopped
·
EVOO, for drizzling
·
6 brioche buns, split
·
36 good-quality ridged or thick-cut potato chips, preferably
cooked in olive oil
·
Sliced sweet pickles, for serving
Preparation
Heat the
butter in a large skillet over medium heat. Add the sliced onions and bay leaf;
season with salt, pepper and the thyme. Cook, stirring occasionally, until deep
caramel in color and very soft, 35 minutes. Deglaze the pan with the beef
consommé and cook until all the liquid is almost absorbed. Let cool, then
discard the bay leaf. Stir in the sour cream.
Preheat a
griddle or large cast-iron skillet over medium-high heat. Place the beef in a
bowl and season with the Worcestershire, salt (for a crusty coating on the
burgers) and pepper. Using a box or hand-held grater, grate 3 to 4 tablespoons
of the peeled onion over the meat (the grated onion and its juice will flavor
the meat itself, plus keep the burgers moist as you cook them). Add the
parsley. Mix the meat, but do not overwork it. Form 6 patties, thinner at the
center than at the edges for even cooking. Drizzle with EVOO. Cook the burgers,
turning once, for 6- 8 minutes for pink centers.
Serve the
burgers on the bun bottoms and top with the sour cream sauce, potato chips, a
couple of pickles each and the bun tops.
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