Lentil, chestnut mushroom and root‑veg shepherd's pie
Hearty, alcohol‑free comfort: earthy lentils and mushrooms in a rich gravy topped with creamy mash. Perfect for Dry January.
This is the sort of dish that makes Dry January feel like a pleasure, not a punishment. Earthy lentils and caramelised chestnut mushrooms give a meaty, deeply satisfying filling without a drop of alcohol.
It’s a one‑dish wonder — simmer the filling while the potatoes boil, then bake until bubbling. Great for batch cooking and leftovers that taste even better the next day.
Ingredients
- 200 g dried green lentils — rinsed
- 900 g potatoes — floury variety, peeled and cut into even chunks
- 300 g chestnut mushrooms — quartered
- 1 brown onion — large, finely chopped
- 2 carrot — medium, peeled and diced
- 2 celery — stalks, diced
- 2 garlic cloves — crushed
- 30 ml olive oil
- 15 ml plain flour
- 30 ml tomato purée
- 800 ml vegetable stock — hot
- 1 bay leaf
- 3 fresh thyme — sprigs
- 15 ml balsamic vinegar
- 15 ml soy sauce — use gluten‑free if needed
- 150 g frozen peas — do not defrost
- 50 g butter
- 100 ml milk — warm
- sea salt — to taste
- black pepper — freshly ground, to taste
Equipment
- ovenproof dish (about 30 x 20cm)
- potato masher
- colander
Instructions
Heat the oven to 200°C fan/220°C conventional.
Put the potatoes in a large saucepan, cover with cold water, add a pinch of sea salt and bring to the boil over a high hob. Reduce to a gentle simmer and cook until tender when pierced with a knife, about 20 minutes.
Meanwhile, heat the olive oil in a large frying pan over a medium hob. Add the brown onion, carrot and celery with a pinch of sea salt and cook, stirring occasionally, for 8 minutes until softened.
Turn the heat up to medium‑high, add the chestnut mushrooms and garlic and cook without crowding the pan until the mushrooms are well browned and their juices have reduced, about 6 minutes.
Stir in the plain flour and tomato purée and cook for 1 minute to remove the raw flour taste.
Pour in the hot vegetable stock, add the dried green lentils, bay leaf and fresh thyme, then stir in the balsamic vinegar and soy sauce. Bring to a gentle simmer and cook, uncovered, until the lentils are tender and the mixture is thickened, about 25 minutes.
Stir the frozen peas through the filling, taste and season with sea salt and black pepper. Remove and discard the bay leaf and thyme stalks if used.
Drain the potatoes and return to the still‑warm pan. Mash with the butter and warm milk until smooth and creamy, then season with sea salt and black pepper.
Spoon the lentil and mushroom filling into a 30 x 20cm ovenproof dish, level the surface, then spread the mashed potato on top. Run a fork over the surface to create ridges and dot with a little extra butter or brush with a little milk for a golden finish.
Bake in the preheated oven until the filling is bubbling at the edges and the mash is golden, about 25 minutes.
Allow the pie to rest for 5 minutes before serving so the filling settles and is easier to portion.
Tips
- Brown the mushrooms in batches if your pan is crowded — good colour = good flavour.
- Make the filling a day ahead and chill; warm through and top with mash just before baking for a speedier supper.
- If you want the mash extra‑creamy, swap 25 g butter for 25 ml double cream (adds richness but increases calories).
- To reheat leftovers, cover with foil and warm at 160°C fan/180°C conventional for 20–25 minutes, then uncover to crisp the top for 5 minutes.
- If the filling seems thin before baking, simmer a little longer to reduce; do not rely on the oven to thicken a watery base.
Substitutions
dried green lentils → dried red lentils the same weight but reduce simmering time by about 5–10 minutes
Stays closeplain flour → cornflour 1 tbsp mixed with 1 tbsp cold water (use at step 6 instead)
Stays closebutter → olive oil 40 ml for a dairy‑free topping (slightly less rich)
Noticeably differentmilk → plant milk 100 ml (oat or soya) to make it dairy‑free
Stays close
Nutrition
Per serving · estimated
- 574
- Calories
- 23 g
- Protein
- 80 g
- Carbs
- 18 g
- Fat
- 12 g
- Fibre
- 6 g
- Sugar
- 900 mg
- Sodium
FAQ
Can I use tinned lentils instead of dried?
Yes — use two 400 g tins, drained (approx 480 g drained). Add them in step 6 and reduce simmering; cook 8–10 minutes to let flavours meld.
How do I make this gluten‑free?
Replace the plain flour with 1 tbsp cornflour mixed with 1 tbsp cold water and stir in at step 6; use gluten‑free soy sauce.
Can I freeze the pie?
Yes — freeze before baking (wrap tightly) for up to 3 months. Bake from frozen at 180°C fan/200°C conventional for 45–55 minutes, covered for the first 30 minutes.
Why did my lentils remain hard?
Either your lentils were old or the simmer was too gentle. Cook longer with the lid off, adding hot stock if needed, until tender.
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