Refrigerator Cucumber Slices - cooking recipe

Ingredients

6 large cucumbers, cut into 1/4 inch slices
3 medium onions, cut into 1/8 inch slices
3 cups sugar
3 cups cider vinegar
4 teaspoons pickling salt
1 1/2 teaspoons mustard seeds
1/2 teaspoon alum

Preparation

In a large container, combine cucumbers and onions.
In a large bowl, combine the remaining ingredients, stirring, until sugar is dissolved.
Pour over cucumber mixture; mix well.
Cover and chill overnight.
May be refrigerated for up to 2 weeks.