Unwrap brie wheel and place in ceramic baker.
Spread fig jam over brie (keep rind on). If using baked garlic, spread a thin layer on top of fig jam, then add nuts.
Sauté onions and garlic over medium heat with butter, until golden brown (this could take up to 10 minutes). Stir in thyme, then spread over top of brie.
In a small sauce pan boil the vinegar until it is thick and syrupy, then drizzle over onions.
Cover brie, then bake at 400°F for 13 minutes. Remove lid, then bake another 5 minutes.
Serve with gluten free crackers or baguette slices.