Mustard-Glazed Mushroom Burger

catalog:

• 2 pounds ground beef (85-percent lean)
• Kosher salt and freshly ground black pepper
• 1/4 cup Dijon mustard 
• 3 tablespoons soy sauce
• 1 teaspoon sugar
• 6 slices Swiss cheese
• 1 tablespoon olive oil
• 8 ounces chopped baby bella or cremini mushrooms
• 2 teaspoons fresh thyme leaves or 1 teaspoon dried
• 2 cloves garlic, minced
• 6 yeasty buns

Directions:

1. Preheat the grill to medium-high heat. 
2. Form the beef into 6 burgers; sprinkle with salt and pepper. To make the glaze, mix together the mustard, soy sauce and sugar in a small bowl. 
3. Grill the burgers until desired doneness, 4 to 5 minutes per side for medium rare, brushing the burgers with the glaze about halfway through. A minute before removing the burgers from the grill, top with the cheese. 
4. Meanwhile, heat the oil in a large skillet over medium-high heat. Cook the mushrooms until beginning to soften, about 5 minutes. Add the thyme and garlic and cook until the mushrooms are soft, about 3 minutes more. Season with salt and pepper. 
5. Toast the buns and serve the burgers with the mushroom topping.

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