Peel and finely chop the garlic cloves and onion. In a saucepan, heat the olive oil and fry the garlic and onion for 5 minutes on a medium heat.
Carefully wash the celery and dice finely. Add it to the pan. Sprinkle with thyme. Add enough water to cover, put on a lid and simmer for 15 minutes.
In a frying pan, brown the lamb chops for 5 to 10 minutes.
Serve with the celery.