A savory bread pudding layered with buttery sautéed leeks, earthy cremini mushrooms, and nutty Gruyère, all bound in a silky custard. The top bakes to a golden, crispy crust while the interior stays moist and spoonable. Perfect as a vegetarian main or a rich side for a holiday table.
Storage: Cover leftovers tightly and refrigerate for up to 3 days. Freezing is not recommended, as the custard may become watery upon thawing. Reheating: Cover with foil and warm in a 350°F (175°C) oven for 15 to 20 minutes, or until heated through. Microwave individual portions on medium power in 30-second intervals. Do not overheat, or the custard may curdle.
Keywords: mushroom leek bread pudding, savory bread pudding, vegetarian bread pudding, Ina Garten mushroom leek bread pudding, Gruyère bread pudding, leek mushroom casserole, Thanksgiving side dish, holiday vegetarian main, baked bread pudding, cremini mushroom recipe