Add salt, vinegar and vanilla to egg whites; beat until it forms peaks. Gradually add sugar, beating until mixture is very firm.

Spoon in mounds 2-inches wide on cookie sheet lined with paper.

Bake at 300°F for 45 minutes. Remove from paper to cake rack when done; cool.

Note: These may be indented before baking and used for shells for strawberries or other berries.

Makes 10 servings.