Preheat oven to 350 degrees Fahrenheit.

Beat egg whites, lemon juice and zest until foamy. Slowly add in whey, stevia and cream of tartar. Beat until stiff peaks form.

Use a teaspoon to spoon cookies onto a cookie sheet lined with parchment paper. Bake for 12 to 15 minutes until lightly browned all over.

Let cool and enjoy! Store in a seal container to retain crispness.