Use sturdy breads like brioche, challah, or French bread for best texture. Day-old bread absorbs custard without falling apart. For dairy-free, substitute milk and butter with plant-based alternatives. Soak bread for at least 15 minutes or overnight for maximum flavor. Broil last 2-3 minutes for a crispier top. Store leftovers refrigerated up to 3 days or frozen up to 2 months.