Place 1 tablespoon leek in blender. Place 3 tablespoons water and the next 4 ingredients (through chopped persimmon) in blender; process until smooth.
Combine frisée and remaining leek in a large bowl, and toss with dressing. Place 1 cup frisée mixture on each of 8 plates. Top each serving with about 1/3 cup sliced persimmon, about 1 teaspoon almonds, and 1 1/2 teaspoons dates.
Wine note: This dish includes sweet and crisp Fuyu persimmons, so look for a wine with similar qualities. While sauvignon blanc can be grassy or herbaceous when grown in cool climates, Guenoc 2007 Sauvignon Blanc, Lake County ($16) from California brings out the tropical side of the grape with sweet flavors of pineapple and passion fruit, while still offering enough acidity to stand up to vinegar dressing. —Jeffery Lindenmuth