For the most flavorful salad, use high-quality smoked turkey and creamy, ripe avocados. To prevent browning, slice the avocado just before serving. Feel free to substitute other cheeses, such as Gorgonzola or Roquefort, for the blue cheese. If Champagne vinegar is unavailable, white wine vinegar makes an excellent substitute. For a vegetarian option, omit the smoked turkey and bacon, and add grilled halloumi cheese or marinated tofu.