Cucumber-onion salad

Cucumber-onion salad
From: FairChatMom

3 large cucumbers, peeled and sliced in 1/4" thick rings
1 medium onion (sweet is best, but any will work) sliced thinly
1/3 cup mayonnaise
2-3 Tablespoons white vinegar
salt and pepper to taste

Place sliced cukes and onion into a big plastic bag or a container with a tight fitting lid. Mix mayo, vinegar, salt, and pepper together to make a smooth dressing. Pour over cukes and onions, and mix together well.

Let sit a couple of hours - best overnight. Stir or turn occasionally. I like to make it in a plastic bag so I can squeeze all the air out, then turn it to distribut the dressing.