Updated: 21 Nov 2024
Soak the split peas in a large bowl of cold water for 1 hour.
Drain the split peas, then tip into a heavy-based saucepan with the turmeric and salt. Pour in the boiling water and crumble in half a stock cube. Bring to the boil, then simmer gently for 1 hour until the split peas are soft and almost all the liquid has been absorbed.
Allow the split peas to cool before pouring into a liquidiser and blending until smooth; add a little water if needed. Return the mash to the pan, stir through the mustard, and warm gently.
Meanwhile, preheat the oven to 200°C. Lay the sausages on a roasting tray and roast for 20–25 minutes, turning occasionally.
Whilst the sausages are cooking, make the gravy. Melt the butter in a saucepan, add the onion, and cook gently for 10 minutes until softened. Stir in the gravy granules and boiling water, and cook for 2 minutes until thickened.
Meanwhile, bring a small pan of water to the boil, add the peas, and cook for 5 minutes. Drain thoroughly.
Serve the sausages with the mustard mash, gravy, and peas.