In a skillet, fry the chopped onion with a drizzle of olive oil until tender.
Preheat your oven to 180°C.
Divide the ground beef into 10 portions, form small balls and flatten them slightly.
Open the burger buns and place them on a baking tray lined with baking paper.
In a dry, hot skillet, quickly brown the meatballs on each side. 1 or 2 minutes only.
Place them on the bottom parts of the burger buns. Add salt and pepper.
On top of the meat add a slice (more or less thick) of camembert, a little sliced onion, a little pesto and half a gherkin (cut lengthwise).
Cover the tops of the buns to form burgers.
Prick the burgers in their thickness with toothpicks.
Bake for a few minutes, no more than 5.
Serve and enjoy, it's a treat!
