Yellowtail Crudo With Citrus and Avocado - Japanese Recipe

Ingredients

• 1 avocado
• 1 clove garlic
• 1 tablespoon crème fraîche or sour cream
• 2 serrano chiles
• seeded
• finely chopped
• 2 tablespoons fresh lime juice
• Kosher salt
• 4 ounces sashimi-grade skinless
• boneless yellowtail fillet
• 2 teaspoons olive oil
• 1 teaspoon fish sauce
• 1 teaspoon finely chopped shallot
• 1/2 teaspoon finely grated peeled ginger
• 1/2 teaspoon yuzu kosho
• 1 radish
• trimmed