Make the relish: Saute onion and garlic in olive oil over medium high heat. Add the mushrooms and cook until soft. Add the wine and reduce it until it becomes a glaze. Add the thyme and seasoning. Set aside.
In a large mixing bowl, Whisk the eggs. Add in the Sour cream and continue whisking. Fold in the flour and cornstarch.
Peel and Shred the potatoes onto the egg mixture. Add in the chopped chives, truffle, and truffle oil. Season and mix well.
Melt butter in a saute pan until it almost turns brown. Use a number 40 scoop or a teaspoon to put the latke mix in the pan. You want the latkes to be about the size of a quarter, no bigger than a silver dollar. Press the mix down to make flat. Cook about 1 to 2 minutes per side. They should have a golden brown hue. You want them crisp, not burnt. Fit as many latkes in the pan as you feel comfortable keeping an eye on.
When done, top each latke with Creme fraiche and Mushroom relish. Serve while they are still hot. This makes a great appetizer or side dish.