-
1
Combine porcini and boiling water in bowl. Soak until soft, about 30 minutes. Strain, pressing out all liquid. Chop porcini.
-
2
Blend potatoes and 1/2 cup onions in processor until finely ground and some liquid forms. Turn mixture out onto kitchen towel. Gather towel around and squeeze mixture very dry. Scrape into large bowl. Add 1 1/2 cups onions and next 4 ingredients. Stir until batter becomes moist. Add porcini.
-
3
Pour enough oil into heavy large skillet to coat bottom; heat over medium-high heat. Working in batches, drop potato mixture into skillet by scant 1/4 cupfuls. Flatten into 2 1/2-inch rounds. Cook until golden, 3 to 4 minutes per side. Transfer to large baking sheet. DO AHEAD:
-
4
Stir nondairy sour cream, chives, and 1 1/2 tablespoons vinegar in small bowl to blend.
-
5
Season with salt and pepper. DO AHEAD:
-
6
Heat oil in large skillet over medium-high heat. Add garlic and all mushrooms; sprinkle with salt and pepper. Saute until brown, 6 to 7 minutes. Sprinkle with 2 tablespoons vinegar; toss. Season with salt, pepper, and more vinegar, if desired.
-
7
Overlap latkes on plates. Mound greens alongside; top with mushrooms. Serve with chive cream.
-
8
Try a full-bodied kosher white wine, like the BARON HERZOG 2007 CENTRAL COAST CHARDONNAY (California $13).