In a large mixing bowl, beat your egg whites on high for about 30 seconds until they are foamy.
Turn down to medium and add the vinegar and corn flour. Beat for another minute or so. Look for soft peaks beginning to form.
As the beater is still running, add the sugar slowly in a constant, steady stream.
Turn the mixer back up and beat for 4-5 minutes or until you see stiff peaks formed.
Now, either leave as is, or divide in half or thirds. (see notes)
Add the appropriate amount of jello powder as suggested in notes. and beat each mixture until blended (took about 30-45 seconds)
Using parchment paper (because it truly helps with sticking - or not sticking in this case), drop your meringue in spoonfuls on the parchment paper. If you feel like being fancy, go ahead and fill a piping bag and go to down being decorative. We didn't care so we made it as is.
Place your baking sheet in your preheated 200 degree oven.
Cook for 90 minutes. Turn oven off at that point and allow them to remain in the oven for several more hours or overnight (we usually do them overnight)
These store beautifully in airtight containers. Enjoy!
Notes
* Granulated Sugar: To get the granulated sugar to the right consistency for the best meringues, pour the cup of sugar into your blender and pulse it several times to get it to a finer grade. It really DOES make a difference!*Jello - You can either use one flavor of jello and use all three tablespoons of that, OR, separate your meringue into 3 equal portions and use only 1 tablespoon per portion of 3 different flavors or types of jello. For this recipe, I divided in half and used 1 1/2 tablespoons of jello powder per portion.