Ingredients

1 green apple, chopped 

Pinch of vitamin C powder 

1 pint fresh red currants 

1/4 cup best-quality extra-virgin olive oil, plus more for garnish 

Sea salt and freshly ground white pepper 

2 to 3 drops white porcini oil 

4 ounces sushi-grade tuna, sliced 1/8-inch thick 

Sea salt and freshly ground black pepper 

1/4 ounces white frisee leaves 

1/4 ounce purple micro radish, thinly sliced 

Preparation

Prepare the vinaigrette; Feed apple through a juicer. Stir in vitamin C powder. Using a spatula or plastic bowl scraper, push currants through a tamis, a very fine mesh strainer. Combine currant puree and 3 tablespoons apple juice in a medium bowl. Gradually whisk in olive oil until emulsified; season with salt and pepper. Whisk in porcini oil. Vinaigrette can be stored, refrigerated in an airtight container, up to 1 week.

Prepare the tuna tartare; Season tuna with salt and pepper. Divide between 2 plates. Drizzle with olive oil; lightly sprinkle vinaigrette on top. Garnish with frisee and radish. Serve immediately.