In a large bowl beat egg whites until soft peaks, slowly add sugar, and salt and beat until stiff, add vanilla and beat in. Place 4 mounda of meringue on parchment paper. Smooth out into 1/4 inch rounds leaving a bit of space between them. Bake 1 hour, turn off oven keep door closed and leave until oven is cold, at least 2 hours. Remove from oven, cut between parchment keeping parchment attached and store in air tight containers. (keeping the parchment attached will keep the meringues from breaking until needed). This can be done up to 4 days in advance.