1 med. cucumber
1/3 c. vinegar
1/3 c. water
2 tbsp. sugar (or more to taste)
1/4 tsp. salt
1/8 tsp. white or black pepper
1 tbsp. finely chopped parsley (optional)
1/2 c. sliced onions (optional)

Peel cucumber. Slice very thin. Place in bowl large enough for the liquid to cover. Stir together vinegar, water, sugar, salt and pepper. Pour dressing over cucumber slices (and onions). Sprinkle with chopped parsley. Cover and let marinate in refrigerator for approximately 3 hours.