Cook With M&S Onion GravyOnion gravy made with Madeira wine and roast beef stock. Ideal for pairing with sausages and mashed potato or adding to casseroles and stews. Simply heat over the hob or in the microwave. Gluten free. Serves 4. M&S Food has been at the heart of the nation since 1884. Giving our customers their best-loved products at the incredible quality and value that only M&S can deliver. From Percy Pig to the freshest M&S Select Farms produce, we grow, source, and develop our own products to give you family-ready food that's unbeatable on flavour and innovation. And that's whether you come to us for your family favourites, an indulgent treat, or your perfect party food spread. After all, this is not just food… This is M&S Food. Our Cook With M&S range includes 100s of time-saving ingredients that make cooking dinner easy.