1/2 c. mayonnaise
1 tbsp. prepared mustard (reg. or Dijon style)
1 tsp. cider vinegar
1/8 tsp. salt or to taste
4 c. celery, sliced diagonally very thin
3 tbsp. green onions with some tops, sliced thin

Mix well mayonnaise, mustard, vinegar, and salt. Add to celery and green onions. Chill at least 1 hour, stirring once or twice. Good as is or in canned pear or peach halves.