Wash and scrub cucumbers. Slice into a medium sized bowl, leaving peel on, about 1/8" thick. Wash and remove seeds from pepper; remove skin from onion and scrub well under cold running water. Finely chop the onion and pepper; add to cucumbers. Sprinkle with salt and celery seed. Cover loosely with plastic wrap and set aside for 1 hour.
In a small saucepan, bring vinegar to a boil then remove immediately from heat. Stir in sugar, stirring until dissolved. Allow to cool, then pour over cucumbers (after they have been sitting for 1 hour, as above).
Mix well; cover and refrigerate for at least 24 hours before serving.
Submitted by: CM