Preheat oven to 200 F

In a medium bowl, add meringue powder, water, and vanilla. Use an electric beater on medium speed to beat the mixture until soft peaks form

On high speed, continue beating the mixture as you add sugar one spoonful at a time

Beat the mixture until stiff peaks form

Spoon 1/4 cup of the mixture into a small bowl and lightly fold in a few drops of food coloring. Remember that a little goes a long ways and that you don't want to mix the air out of your meringue

Lightly fold the colored meringue back in with the rest until red swirls form. Fill a pastry bag with the meringue and pipe 2 inch hearts onto baking sheets lined with parchment paper

Bake for 20-25 minutes. Let cool in the oven for 6-8 hours. Store in an air tight container