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Second City Diner Veggie Burger

These Second City Diner veggie burgers offer a hearty, plant-based alternative to traditional fast food. Combining the earthy flavour of finely chopped mushrooms with the textured bite of rolled oats, these patties are both satisfying and nutritious. Unlike many shop-bought versions, this vegan recipe relies on simple, wholesome ingredients to create a firm texture that holds up beautifully during cooking and serving.

Perfect for a midweek family dinner or a weekend barbecue, these burgers are packed with savoury depth thanks to a blend of soy sauce and aromatic spices. The method involves simmering the base before baking and finishing in a frying pan to achieve a delicious, golden-brown crust. Serve them in toasted buns with fresh salad, pickles and your favourite vegan condiments for a complete meal.

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Ingredients for Second City Diner Veggie Burger

  • 950ml water

  • 1 onion, finely chopped

  • 3 stalks celery, finely chopped

  • 60ml low-sodium soy sauce

  • 2 teaspoons onion powder

  • 2 teaspoons garlic powder

  • 1/2 teaspoons freshly ground black pepper

  • 275g rolled oats (not quick-cooking)

  • 350g mushrooms, finely chopped

  • 60g white wholemeal flour

Place the water in a large pot with the onion, celery, soy sauce, onion powder, and garlic powder. Bring to a boil, reduce the heat, and simmer for 5 minutes. Stir in the oats, mushrooms, and flour and cook 5 minutes longer. Transfer to a bowl and chill for at least 1 hour, preferably longer.Preheat the oven to 177°CShape the mixture into burger-sized patties and place on the baking sheets. Bake for 15 minutes. Remove from the oven and let rest for 5 minutes. Carefully flip over and bake 10 more minutes.Before serving, place the baked patties on a nonstick griddle and grill for about 7 minutes on each side, until browned. Serve on buns with topping of your choice.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

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UK recipe editors

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UK recipe editors

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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