Sushi Tuna Bruschetta with Wasabi Crema

Ingredients

• 3 ounces stemmed and sliced shiitake mushrooms
• 1 teaspoon olive oil
• 1 can Mandarin oranges (11ounces), drained
• 2-1/2 Tablespoons hoisin sauce
• 1 teaspoon toasted sesame oil
• 1/4 cup sour cream
• 1 teaspoon wasabi paste from tube
• 8 ounces fresh sushi grade tuna steaks
• 1 Tablespoon olive oil
• 12 slices (cut 1/2 inch thick) from a 2-3 inch wide ciabatta loaf
• 2 Tablespoons olive oil
• 12 thinly sliced cucumber rounds
• 1/4 cup pickled ginger slices
• 1/4 cup chopped cilantro