I like to use white and red cabbage for the colour, but you can use just white, if you want.
1/2 cabbage, shredded
2 carrots, grated
2 celery sticks, finely sliced
1 1/2 cups green onions (shallots) or spring onions, finely sliced
1 cup whole egg mayonnaise
3/4 cup thickened cream
3 tbsp lemon juice
cracked black pepper
Put dressing ingredients in small bowl & whisk well to combine.
Put salad ingredients in large bowl & toss.
Stir dressing through salad to coat ingredients well.