With a clean Kitchen towel, or paper towels, make sure there is no grease, fat, water, or anything else in the mixing bowl, as that may keep the egg whites from whipping into stiff peaks.
Place the egg whites in the mixing bowl of a stand mixer, add the cream of tartar, and salt, and mix on Medium until you see a lot of little bubbles forming across the egg whites. Turn your mixer up one speed, and you'll see more little bubbles.
Add the Vanilla, and Sugar one Tablespoon at a time, beating after each addition until all the Sugar is added, and dissolved. Turn the mixer on high, and beat the egg whites with the Whisk attachment until they form thick stiff glossy peaks, about 5 - 7 minutes - (see photo).
Turn the mixer off once the egg whites are at this stage. If you're adding food coloring, ONLY use Gel food coloring, Divide your egg whites into as many bowls, as you are using Gel colors for. When you've finished, add the Gel coloring to the egg whites, and fold the Gel coloring into the egg whites, just until blended.
Place the egg whites in a piping bag with the large Star tip, and pipe the Egg Whites onto a Parchment paper lined cookie sheet in a swirling motion, coming up to a point. If you don't want to pipe the Meringues, you may spoon them onto the Parchment paper, by the Tablespoonful.
When you have filled the parchment lined cookie sheet, place it in the oven at 250 degrees for 1 hour, then turn the oven off, and leave the Meringues in the oven for an hour with the door closed. After one hour, remove the Meringues from the oven, and completely cool on the parchment paper lined cookie sheet. Serve and Enjoy!