Festive chestnut & seed roast with vegan mushroom gravy

Onion & Mushroom Gravy Sachet (25%) (Water, Cornflour, Onion Purée, Brown Sugar, Mushroom Concentrate, Yeast Extract, Balsamic Vinegar, Yeast Extract Powder, Salt, Colour: Plain Caramel; Carrot Juice from Concentrate, Porcini Mushroom Powder, Thyme, Onion Powder, Rapeseed Oil, Onion Concentrate, Black Pepper), Fortified Wheat Flour (Wheat Flour, Calcium Carbonate, Iron, Niacin, Thiamin), Seeds (8%) (Sunflower Seeds, Pumpkin Seeds), Mushroom, Onion, Spinach, Chestnut, Lentils, Rapeseed Oil, Water, Leek, Red Onion, Garlic, Wheat Gluten, Rye Flour, Cranberries, Yeast Extract, Apple Juice from Concentrate, Pea Fibre, Salt, Maltodextrin, Mushroom Concentrate, Demerara Sugar, Lemon Juice from Concentrate, Thyme, Sugar, Onion Powder, Garlic Powder, Onion Extract, Turmeric, White Pepper, Sage, Parsley, Yeast, Tomato Powder, Acidity Regulator: Citric Acid; Rosemary, Sunflower Oil, Black Pepper, Allspice, Coriander, Ginger, Stabiliser: Xanthan Gum; Marjoram, Flavouring, Preservative: Potassium Sorbate; Paprika Extract.