Yes, you can make it ahead of time. Here's what you do: 1. Make the cream cheese mix. 2. Stuff the peppers with the cream cheese mix. 3. Wrap in a plastic wrap and keep it in the fridge for 3 to 4 days. Or in the freezer for 3 months. 4. When ready to cook, top them with breadcrumbs and cook till the tops are golden brown.