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Once I looked at this recipe that I got via email today, I decided it was worth it just for the onion mushroom jam. But the photo of the finished burger looked really good, with thick onion mushroom jam on top of a burger covered with melted Gruyere cheese and finished on top with some thinly sliced radicchio instead of lettuce!
Grilled Burgers with Mushroom & Onion Jam
Makes 4 burgers. Recipe from Saveur.com / June 2016
Onion-Mushroom Jam:
6 Tablespoons butter, divided
1 small onion, sliced 1/8-inch thick, about 1-3/4 cups
Kosher salt
2 shiitake mushrooms, sliced 1/8-inch thick, about 1 cup
1 portabella mushroom, sliced 1/8inch thick, about 2 cups
1 small shallot, minced
2 cups red wine
1/4 cup red wine vinegar
2 Tablespoons heavy cream
1 Tablespoon plus 1 teaspoon brown sugar
Burgers:
4 Tablespoons butter, softened
4 burger buns
1-1/2 lb. ground beef (80% lean)
Kosher salt
6 oz. Gruyere, cut into 1/8-inch slices
1/2 small head of radicchio, thinly sliced
For the Jam:
1. In a large sauté pan, melt 2 Tablespoons of butter over medium-high. Add onions and a pinch of salt and cook, stirring occasionally, until the onions turn light brown and very soft, about 7 minutes. Add 2 more Tablespoons of butter and the mushrooms. Season with salt and cook, stirring frequently, until they turn tender and dark brown, about 3 minutes.
2. Using a slotted spoon, transfer mushrooms and onions to a bowl and set aside. Add shallots to the pan and cook, stirring frequently, until they begin to soften and become aromatic, about 1-1/2 minutes. Add red wine, increase heat to high, and bring wine to a boil. Reduce wine to 1/2 cup, scraping the bottom and sides of the pan with a wooden spoon to loosen any browned bits, about 15 minutes.
3. Add vinegar, heavy cream, sugar, and the remaining 2 Tablespoons of butter, and continue to reduce mixture until it forms a thick sauce that clings to the back of a spoon and leaves a clean line when a finger is swiped across the back, 5 to 6 minutes. Stir in onions and mushrooms, season with salt, and remove from heat to set aside.
For the Burgers:
1. Heat a grill or a cast-iron grill pan over medium-high. Form meat into 4 patties slightly larger than the buns, press a slight indentation into the middle of each patty, and season heavily with salt.
2. Using a spatula or butter knife, spread softened butter evenly on the cut sides of the burger buns. Grill burgers, flipping them occasionally, until cooked to desired doneness, about 10 minutes for medium rare. Melt 1 to 2 slices of cheese on each burger, then set aside to a clean platter to rest.
3. Toast buns on the grill, cut-side-down, until they just turn golden, 1 to 2 minutes. Top with burgers, fat spoonsful of onion-mushroom sauce, and radicchio.
Grilled Burgers with Mushroom & Onion Jam
Makes 4 burgers. Recipe from Saveur.com / June 2016
Onion-Mushroom Jam:
6 Tablespoons butter, divided
1 small onion, sliced 1/8-inch thick, about 1-3/4 cups
Kosher salt
2 shiitake mushrooms, sliced 1/8-inch thick, about 1 cup
1 portabella mushroom, sliced 1/8inch thick, about 2 cups
1 small shallot, minced
2 cups red wine
1/4 cup red wine vinegar
2 Tablespoons heavy cream
1 Tablespoon plus 1 teaspoon brown sugar
Burgers:
4 Tablespoons butter, softened
4 burger buns
1-1/2 lb. ground beef (80% lean)
Kosher salt
6 oz. Gruyere, cut into 1/8-inch slices
1/2 small head of radicchio, thinly sliced
For the Jam:
1. In a large sauté pan, melt 2 Tablespoons of butter over medium-high. Add onions and a pinch of salt and cook, stirring occasionally, until the onions turn light brown and very soft, about 7 minutes. Add 2 more Tablespoons of butter and the mushrooms. Season with salt and cook, stirring frequently, until they turn tender and dark brown, about 3 minutes.
2. Using a slotted spoon, transfer mushrooms and onions to a bowl and set aside. Add shallots to the pan and cook, stirring frequently, until they begin to soften and become aromatic, about 1-1/2 minutes. Add red wine, increase heat to high, and bring wine to a boil. Reduce wine to 1/2 cup, scraping the bottom and sides of the pan with a wooden spoon to loosen any browned bits, about 15 minutes.
3. Add vinegar, heavy cream, sugar, and the remaining 2 Tablespoons of butter, and continue to reduce mixture until it forms a thick sauce that clings to the back of a spoon and leaves a clean line when a finger is swiped across the back, 5 to 6 minutes. Stir in onions and mushrooms, season with salt, and remove from heat to set aside.
For the Burgers:
1. Heat a grill or a cast-iron grill pan over medium-high. Form meat into 4 patties slightly larger than the buns, press a slight indentation into the middle of each patty, and season heavily with salt.
2. Using a spatula or butter knife, spread softened butter evenly on the cut sides of the burger buns. Grill burgers, flipping them occasionally, until cooked to desired doneness, about 10 minutes for medium rare. Melt 1 to 2 slices of cheese on each burger, then set aside to a clean platter to rest.
3. Toast buns on the grill, cut-side-down, until they just turn golden, 1 to 2 minutes. Top with burgers, fat spoonsful of onion-mushroom sauce, and radicchio.