Braised Beef Mac and Cheese (2 portions)

Ingredients: Puff pastry, water, chicken, Yukon gold potatoes, milk 2%, salted butter, flour, celery, carrots, onions, green peas, chicken broth (chicken broth [water, concentrated chicken broth], salt, sugar, yeast extract, chicken fat, corn starch, citric acid, natural flavour), eggs, sage, salt & pepper