01 - Set the oven temperature to 300°F.
02 - In a baking dish, mix figs, walnuts, maple syrup, brown sugar if using, vanilla extract, cinnamon, salt, water, and lemon juice until evenly coated.
03 - Spread the mixture evenly within the baking dish.
04 - Cover loosely with foil and roast in the oven for 45 minutes.
05 - Remove foil, stir gently, then roast uncovered for 30 more minutes until figs become jammy and syrup slightly thickens.
06 - Take the dish from the oven and let cool slightly. Serve warm or at room temperature.