In large bowl combine chicken, cheese, bacon and walnut praline. Mix to combine. Add dressing and mix to coat. Serve on a bed of romaine lettuce.;
In a small bowl whisk together dressing ingredients. Set aside.
In a bowl stir together walnuts, salt and cayenne. In a dry small heavy skillet or saucepan cook sugar over moderate heat, stirring with a fork, until melted and cook, without stirring, swirling skillet or pan, until golden caramel. Add walnut mixture and stir to coat nuts with caramel. Spoon praline onto a sheet of foil and cool. Transfer praline to a cutting board and chop fine. Praline can be made 3 days ahead and kept in an airtight container.;