Preheat your oven to 180°C/Fan 160°C/Gas 4. Fill and boil your kettle. Peel and finely slice the onion. Thickly slice the chestnut mushrooms. Peel and grate or crush the garlic. Finely chop the parsley stalks, setting the leaves aside for later.

Pour 350ml boiling water into a small pan, set on a high heat and bring back to the boil. When the water is boiling, add the pearl barley with a pinch of salt. Cover, turn the heat down a little and simmer for 20-25 mins till the barley is tender.

While the barley cooks, line a baking tray with foil. Rub 1 tsp olive oil onto the skin of each of the smoked haddock fillets and lay them on the tray, skin-side up. Season with a little salt and pepper. Bake in the oven for 12-15 mins, till the fish is opaque and flakes easily when pressed with a fork.

While the fish cooks, warm a deep frying pan on a high heat. Add the onion and mushrooms with 1 tsp olive oil and a pinch of salt and pepper. Fry for 5-8 mins, stirring occasionally, till the onion and mushrooms are golden.

Stir in the garlic and parsley stalks. Cook and stir for 1 min. Crumble in half the stock cube and pour in 150ml boiling water. Pop on a lid and simmer for 5 mins till the mushrooms are tender. Stir in the spinach to wilt it. Take the pan off the heat.

The pearl barley should be tender by now. Drain off any excess water and divide between 2 warm plates. Top wit the veg and plenty of sauce. Lay a smoked haddock fillet on each plate and garnish with roughly chopped parsley leaves to serve.