1/Cut small round toasts from a 'baguette' (or other bread), align them on a large oven dish and pour on each of them 1 or 2 drop(s) of olive oil
2/Put on each toast ('croûton') a small (flat) piece of parmesan cheese, then a small spoonful of cold ratatouille and then a few capers
3/Switch on the oven on the grill position, tell your guests to sit down aound the table and when the grill is well hot (2-3 minutes), introduce the dish into it during 4-5 minutes until the ratatouille is grilled and serve on the table with a wood stick in each croûton.
This is a only a simple suggestion but you can imagine others ... If you take a picture of your dish, please forwart it to us so that we can post it with the recipe.
credits photo : © Asfaux Patrick - A.F.Touch