Bring a shallow pan of water to a boil. Add the white wine vinegar. Reduce the heat to a simmer and stir to get the liquid moving in one direction, like a whirlpool. Break in the eggs, one at a time. Poach until the white is set, but the yolk still runny inside, 2 to 3 minutes. Lift them out with a slotted spoon, and set them on paper towel to drain. (You can trim the edges a little if you want to). Turn off the water, and cover to keep warm for reheating the eggs.
Wash the frisee and spin dry. Fry the bacon in a saute pan or wok until crisp, about 5 minutes. Deglaze the pan with the red wine vinegar and boil to reduce to about 2 teaspoons. Add enough oil to make a dressing. Toss the frisee in the pan for a few seconds just to coat; don't let it wilt. Divide among 2 plates and season with fleur de sel and pepper. Reheat the eggs in the water for a second or two, lift out, drain and set alongside each salad. Season, and serve.
Recipe courtesy of Laura Calder