Prepare all the ingredients.
Clean the frisée, drain and wipe thoroughly.
Bring to a simmer, a saucepan filled with salted water along with the glass of white vinegar.
Break the eggs in a ramekin and slide them into the simmering water.
Poach for 3 minutes.
Drain and place them on absorbant paper.
Sauté the gizzards confits to heat them.
Dice the gruyere.
Prepare the vinaigrette with the oil, balsamic vinegar, salt and pepper.
Just before serving, dress the salad with the vinaigrette.
Dress on plates and top with poached eggs, warm gizzards, diced cheese and walnuts. Serve.