Spiced Mushroom & Soya Wellington with Roast Potatoes

Easy | Vegan | Serves 2 | Prep & Cook: ~45 mins

This cosy plant-based dinner brings together flaky puff pastry, a hearty mushroom and soya filling with warming spices, and crispy oven-roasted potatoes. It’s flavourful, satisfying, and surprisingly simple to make! 💚


🛒 Ingredients (Serves 2)

🥐 160g ready-to-bake puff pastry
🍄 160g chestnut mushrooms
🥕 1 carrot
🧅 2 red onions, thinly sliced (for the gravy)
🧄 1 garlic clove
🧅 1 shallot
🌱 60g soya mince, cooked as per package
🧂 20mL soy sauce
🌶 1 tsp smoked paprika
🌿 1 tsp cumin
½ tsp ground ginger
🔥 ½ tsp chilli flakes (optional)
🥔 3 white potatoes, peeled & cut into small cubes
🫒 Olive oil
🧂 Salt & pepper, to taste
🌰 25g walnuts
🍇 15mL balsamic vinegar
🍬 1 tsp sugar
🌿 1 tsp dried sage (or swap for thyme or rosemary)
🧂 1 vegetable stock cube or pod

Optional for Mash:

🧈 Plant-based butter
🥛 Plant milk


🍳 Method

Preheat oven to 180°C (fan).


1. 🥔 Roast the Potatoes

Toss the cubed potatoes in olive oil, salt, and pepper. Spread them on a baking tray and roast for 20 mins — these cook at the same time as the Wellington. Easy peasy! 🙌

Optional: Prefer mash? Boil the peeled potatoes until soft (12–15 mins), then mash with vegan butter and a splash of plant milk.


2. 🍄 Make the Filling

Pop into a food processor:

  • Mushrooms
  • Carrot
  • Shallot
  • Garlic
  • Walnuts
  • Dried sage (or substitute)

Pulse until finely chopped.

In a pan with a splash of olive oil, cook the mixture for 5–10 mins, then stir in the cooked soya mince and soy sauce.

Add:

  • Smoked paprika
  • Cumin
  • Ginger
  • Chilli flakes (if using)

Cook for another 2–3 mins, then remove from heat.


3. 🥐 Assemble the Wellingtons

Lay out your ready-to-bake puff pastry on a lined baking tray and divide into two rectangles.

Spoon the filling onto each half and fold into parcels. Seal the edges (crimp with a fork if you’re feeling fancy). Brush the tops with plant milk for a golden finish ✨

Bake for 20–25 mins, alongside the potatoes, until golden and crispy.


4. 🧅 Make the Onion Gravy

In a small pan, gently fry 2 sliced red onions in a little vegan butter for 10–12 mins until soft and golden.

Add:

  • 1 tsp sugar
  • 15mL balsamic vinegar
  • 1 tbsp flour (stir well)

Then slowly pour in 250mL hot water with the vegetable stock dissolved in it. Simmer until thickened, then season to taste.


5. 🍽️ Serve & Enjoy

Plate your crispy golden Wellington with roasted potatoes (or mash!), pour over the rich onion gravy, and enjoy a deeply satisfying, flavour-packed vegan dinner. 💛


✨ A little effort, a lot of flavour — and totally plant-based! ✨
Tried it? Let me know in the comments, and tag @TheSecretStreet if you post your plate! 📸💬🌱

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I’m Montse

Welcome to The Secret Street!

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