To serve: Toast the baguette halves until slightly crisped, about 1 minute. Spread the liver pâté evenly on the bottom halves. Divide the sliced steak between the bread bottoms. Place 3 slices of the cheese over it. Add the sorrel, cilantro, pickled vegetables and jalapeños. Spread the mayonnaise on the cut sides of the top buns. Season with salt and pepper and put on the bun tops. Serve.