Ingredients

• Ingredients
  1. 6 ounces shiitake mushrooms, stems discarded
  2. 3/4 cup extra-virgin olive oil
  3. 1 garlic clove
  4. 1/4 cup plus 1 tablespoon fresh lemon juice
  5. 1/2 teaspoon truffle oil, or more to taste (optional)
  6. Salt and freshly ground pepper
  7. 2 cups vegetable oil
  8. 5 large shallots, thinly sliced and separated into rings
  9. 1/2 cup all-purpose flour
  10. 3 heads of frisée, torn into bite-size pieces
  11. 2 heads of radicchio, coarsely shredded
  12. 4 Belgian endives, separated into individual spears
  13. 12 thin slices of prosciutto

Directions

1. Preheat the oven to 350°. Toss the shiitakes with 1 tablespoon of the olive oil. Spread them on a baking sheet and roast for about 20 minutes, turning once, until tender and barely crisp. Let cool.
2. In a blender or food processor, pulse the mushrooms and garlic until finely chopped. Add the lemon juice and, with the machine on, pour in the remaining olive oil in a thin stream. Transfer to a bowl. Stir in the truffle oil and season with salt and pepper.
3. Heat the vegetable oil in a saucepan. In a bowl, toss the shallots with the flour, shaking off the excess. Working in 2 batches, fry the shallots over high heat, stirring, until golden and crisp, about 6 minutes. Transfer the shallots to paper towels to drain. Season lightly with salt.
4. In a large bowl, toss the frisée with the radicchio and endives. Add half of the dressing and toss well. Season with salt and pepper, add the remaining dressing and toss again. Transfer the salad to a platter, top with the prosciutto and fried shallots and serve.

Make Ahead

The recipe can be prepared through Step 3 up to 1 day ahead. Refrigerate the vinaigrette and store the shallots at room temperature.