Seared Scallops with Avocado and Daikon

Name: Seared Scallops with Avocado and Daikon
Ingredients: 1/2 medium daikon (Japanese white radish; about 12 ounces) or 4 radishes, very thinly sliced on a mandoline; 1 tablespoon white wine vinegar or white balsamic vinegar; 1 tablespoon yuzu juice; Kosher salt; 8 sea scallops (about 1 pound), side muscles removed; 1 tablespoon olive oil, plus more for drizzling; 1 avocado, very thinly sliced; 1 tablespoon fresh lemon juice; 1 teaspoon green yuzu kosho; 1/2 teaspoon finely grated grapefruit zest; 1 tablespoon fresh grapefruit juice; Ingredient info: Yuzu kosho, a paste made of yuzu zest, chiles, and salt, is available at Asian markets and online.