Mushroom and Parmigiano Bruschetta

Bahan-bahan (4 porsi)

• ½ cup chopped, seeded Roma tomato
• 2 tablespoons sherry vinegar
• 1 teaspoon capers
• ½ teaspoon granulated white sugar
• ¼ teaspoon crushed red pepper
• ⅛ teaspoon salt
• 10 leaves thinly sliced basil
• 2 teaspoons salted butter
• ⅓ cup sliced cremini mushrooms
• ⅓ cup sliced shiitake mushrooms
• ⅓ cup sliced baby portobello mushrooms
• ¼ cup chopped green onions
• 1 medium garlic clove, (minced)
• Eight ½-inch thick slices baguette, (cut on the diagonal and toasted)
• ¼ cup (1-ounce) shaved Parmigiano-Reggiano cheese