Old-school chicken liver parfait

INGREDIENTS

• 300 g butter, softened
• olive oil
• 2 shallots, peeled and finely chopped
• 2 cloves garlic, peeled and finely chopped
• 400 g higher-welfare chicken livers, trimmed
• a few sprigs fresh sage, leaves picked
• 1 small wineglass brandy
• sea salt
• freshly ground black pepper
• 1 pinch ground mace
• 1 loaf French or ciabatta bread
• 1 punnet salad cress