Cook the Book: Mushroom Beef Burger

Ingredients

  • About 1/2 cup olive oil
  • 1 tablespoon plus 1/4 teaspoon finely chopped fresh thyme
  • 1 teaspoon freshly grated lemon zest
  • 1/2 pound (about 5 medium) portobello mushrooms, stems removed
  • Sea salt and freshly ground black pepper
  • 1 pound asparagus
  • 2 pounds coarsely ground chuck, chilled
  • 1/2 cup finely chopped red onion
  • 1 tablespoon Dijon mustard
  • 1/2 cup mayonnaise
  • 4 ciabatta buns
  • 4 large slices (about 6 ounces) Brie cheese
  • 1 large ripe tomato, thickly sliced

Description

Serious Eats Favicon Serious Eats
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