How to Make It
Preheat oven to 200˚. Let egg whites stand 20 minutes. Beat egg whites at high speed with an electric mixer, using whisk attachment, until stiff peaks form. Reduce speed to medium. Add vinegar; add sugar, ½ cup at a time, and beat until blended. Beat 2 minutes. Beat in extract.
Paint 3 or 4 evenly spaced thin stripes of red food coloring gel on inside of a decorating bag, starting at tip and ending three-fourths of the way up the bag. Gently spoon meringue into center of bag, filling three-fourths full. Cut off tip of 1 corner of the bag, and squeeze bag to from kisses on the baking sheet.
Bake at 200˚ for 2 hours. Turn off oven, and let meringues stand in over until completely cool (about 3 hours).