Preheat oven to 225 degrees and line 2 baking sheets with parchment paper. In a large metal bowl using an electric mixer, beat the egg whites and cream of tartar together at high speed until soft peaks form. Gradually add the stevia, brown sugar and cinnamon a little at a time, then add the vanilla, beating well after each addition until you get stiff peaks, and the sugar is dissolved. Drop mixture by tablespoons on the baking sheets and bake for 60 – 70 minutes or until meringues have “hardened.”