Ingredients

  • 3 tablespoons butter
  • 12 ounces assorted wild mushrooms (such as stemmed shiitake, oyster, black trumpet, and crimini), sliced
  • 1 1/2 teaspoons chopped fresh thyme
  • 1/4 cup red wine vinegar
  • 3 tablespoons fresh thyme leaves
  • 2 tablespoons mayonnaise
  • 1 small shallot, chopped
  • 1/2 cup olive oil plus more for brushing
  • 8 1/3- to 1/2-inch-thick slices pain rustique or other flat country bread
  • Truffle oil

Method

  • Melt butter in large skillet over medium-high heat.
  • Add mushrooms and thyme.
  • Saute until browned, about 8 minutes.
  • Season with salt and pepper.
  • DO AHEAD: Can be made 1 day ahead.
  • Cover; chill.
  • Rewarm before using.
  • Blend first 4 ingredients in blender 10 seconds.
  • With machine running, gradually add 1/2 cup olive oil; blend until almost smooth.
  • Season to taste with salt and pepper.
  • Preheat oven to 400F.
  • Arrange bread on rimmed baking sheet.
  • Brush with oil.
  • Bake until beginning to crisp, about 8 minutes.
  • Mound 1/4 cup mushrooms on each bread slice.
  • Drizzle each with thyme vinaigrette, then sparingly with truffle oil.