Дуо из говядины, радиккьо с костным мозгом, дофин из сладкого картофеля по рецепту 'Daniel'

Ингредиенты

• 1 teaspoon cracked black pepper (we recommend Pierre Poivre)
• 1 teaspooon fleur de sel
• 1 tablespoon olive oil
• 3 (2-inch-long) beef marrow bones, soaked in ice water for at least 12 hours
• 1/2 cup (1 stick) butter
• 1 cup minced shallot
• 3 ounces
• 1/4 teaspoon salt
• 1/8 teaspoon piment d’Espelette
• 1/8 teaspoon white pepper
• 2 heads radicchio di Treviso
• 2 tablespoons olive oil
• Salt and freshly ground white pepper
• 1/4 cup balsamic vinegar
• 1/4 cup chicken stock
• 2 sweet potatoes (about 1 pound peeled)
• 4 tablespoons butter
• 2 cups milk
• Salt and freshly ground white pepper
• 1 large (about 12 ounces) russet potato
• 1/2 cup kosher salt
• 3 tablespoons butter
• 1 3/4 ounces sweet potato, cut into small dice, reserved from above
• 3/4 teaspoon salt
• 5 tablespoons flour
• 1 egg
• Freshly ground white pepper
• 2 cloves black garlic, peeled and halved lengthwise
• Canola oil for frying
• 4 servings