Yes, you can. It's actually easier to do this - you can even bake them, turn the oven off and leave them in there overnight to properly cool. Once they're cool, transfer to an airtight container to store. They will keep for 2 - 3 days but are really best served earlier rather than later (the fluffy inside will start to collapse a bit after the first day). Once you've topped the pavlovas they need to be eaten right away, as they'll soften up under the filling.