Seared Maitake Mushrooms Recipe

Ingredients

• 1 leek, white and pale-green parts only, thinly sliced
• Kosher salt
• 1/2 small shallot, finely chopped
• 2 cornichons, finely chopped
• 1/3 cup vegan or regular mayonnaise
• 2 tablespoons Dijon mustard
• 1 tablespoon capers, finely chopped
• 1 tablespoon chopped fresh dill
• 1 tablespoon chopped fresh tarragon
• Freshly ground black pepper
• 2 garlic cloves, finely chopped
• 2 tablespoons plus 1/2 cup olive oil
• 2 8-ounce maitake mushrooms, cleaned, halved through the stem
• Kosher salt, freshly ground pepper