Pumpernickel Bread Pudding

Preheat oven to 350°F (180°C). Butter the sides of a 9-inch (23-cm) square baking dish and rub with a piece of the garlic. In a sauté pan over medium heat melt remaining butter. Add onion and celery and cook, stirring often, until translucent, about 5 minutes. Stir in lovage, thyme and