Preheat your oven to 220°C/200°C fan/gas mark 7. Boil a full kettle.

Pour the boiled water into a large saucepan on high heat with ½ tsp salt and bring back to the boil.

Halve, peel and thinly slice the red onion. Trim the carrots and parsnips, then halve lengthways (no need to peel). Chop into roughly 1cm wide, 5cm long batons.

Pop the carrots and parsnips onto a large baking tray. Drizzle with oil, sprinkle over the Caribbean style jerk and season. Toss to coat. Spread out in a single layer. TIP: Use two baking trays if necessary.

Pop the sausages alongside the veg and roast on the middle shelf of your oven until both are cooked through, 25-30 mins. IMPORTANT: Wash your hands and equipment after handling raw meat. The sausages are cooked when no longer pink in the middle.

While everything roasts, heat a drizzle of oil in a medium saucepan on medium heat. Once hot, add the onion and fry until softened, 6-8 mins.

Meanwhile, chop the potatoes into 2cm chunks (peel first if you'd prefer).

When your pan of water is boiling, add the potatoes and cook until you can easily slip a knife through, 15-20 mins.

Once the onion has softened, add the butter (see pantry for amount) and melt, then stir in the flour (see pantry for amount). Continue to stir until combined - you've made a roux! Cook, stirring, until the roux is a medium brown colour, 2-3 mins.

Gradually stir in the water for the gravy (see pantry for amount), then stir in the chicken stock paste and bring to the boil. Stir out any lumps that form.

Lower the heat and simmer, stirring occasionally, until the gravy has thickened to your liking, 10-12 mins. 

Once the potatoes are ready, drain in a colander and pop back into the pan. Add a knob of butter and a splash of milk (if you have any) and mash until smooth.

Season with salt and pepper. Cover with a lid to keep warm.

When everything's ready, reheat the gravy if necessary, then stir through the mango chutney. Taste and season with salt if needed. Add a splash of water if it's a little too thick.

Share the roasted sausages, carrots and parsnips between your plates. Serve the mash alongside.

Drizzle over the mango chutney gravy to finish.