Prepare meringue according to Pavlova directions.
To make heart shapes, either use a spoon to form the shape or place meringue in a piping bag, onto a parchment or silicone lined baking sheet.
Bake at 200°F for 1 hour on middle rack. Turn oven off and let cool in oven (with door slightly ajar). If they start to brown, take out of oven. Cool completely.
On a cutting board, shape ice cream into similar sized heart shapes, then gently sandwich between 2 crispy meringue hearts (don't press to hard, or they will crack).
Wrap in waxed paper and freeze for up to a maximum of 4 hours. If they remain in the freezer any longer than 4 hours, the meringue will soften too much and will be difficult to handle.