To make the honey onion relish: melt the butter in a pan and add the onions; sauté the onions for 4 to 5 minutes and then add the remaining ingredients. Simmer, stirring all the time to stop it sticking, for 20 to 30 minutes until it is thick. Cool and set to one side until needed
Pre-heat oven to 200C/400F/Gas mark 6
Using a 5cm to 6cm cutter, stamp out 12 circles from the sliced bread, and butter them on one side only. Place the buttered sides down into a 12-hole bun-tin, pressing them to create a tartlet shape
Add a teaspoon of honey onion relish into each bread tartlet base, and then place the pieces of Le Rustique Brie de Caractère on top
Bake for 8 to 10 minutes until the cheese has melted and the bottom of the bread tartlet bases are crispy and golden brown
Gently ease them out of the tray and sprinkle chopped fresh chives over them before serving