Separate eggs and place egg whites in a mixing bowl. 

Line a baking sheet with parchment paper.

Allow the egg whites to come to room temperature. This should take about 45 minutes.

Preheat oven to 200F.

Add vanilla extract, salt and lemon juice to bowl with egg whites.

Beat with a mixer on medium until the mixture starts to foam. 

Once it is foamy, gradually add sugar, one tablespoon at a time.

Beat the mixture until stiff peaks form.

Transfer the mixture to a pastry bag. (Skip this step if you are spooning them on.)

Pipe out cookies on the baking sheet that are about 1" in diameter and about 2" apart.

Bake in the oven for 35 minutes or until they are firm to the touch. _Baking times will vary by oven. _

Turn off the oven and open the oven door but leave the cookies in the oven for an hour. 

Remove the cookies from the oven and allow them to cool completely.

Serve and enjoy!