While you can use regular fresh squeezed orange juice, this is simple and excellent.
Since you are mixing the champagne, buy the least expensive champagne. No need to waste money.
Chill bottles in...
12 tablespoons champagne vinegar
8 tablespoons Dijon mustard
3 cups walnut oil
1/2 cup honey
1/2 cup water
salt
white pepper
Garnish -
Top off your salad with english or toasted black walnuts.
1/8 cup toasted finely chopped black walnuts
...