Simple Meringue

Combine egg whites, lemon juice, and vanilla in the bowl of an electric mixer. Whip, first on low speed, then slowly progressing to high speed, until soft peaks form, about 1 1/2 minutes.

Slowly sprinkle the sugar a little at a time over the egg-white mixture, and whip until glossy peaks are formed, about 3 minutes.

Sift the cornstarch over the meringue, and fold in. Use meringue immediately.