1. Lightly heat the Dutch oven and add the oil. Sauté the onions, do not let them brown - they should soften and go translucent.
2. While the onions were cooking, I put the sausages on a rack directly over the flames to seal and brown the outside. They don't need to cook through as this will happen later. I managed to tilt the grill in such a way that the oil and juices went into the Dutch oven for extra flavour.
3. Once the sausages are browned add them to the onions and pour in the stock, beer and cider. I added a good spoonful of thyme and a few good glugs of Worchester Sauce. Give it all a good stir and bring the oven to the boil, cover and simmer for 45 minutes.
4. By now the broth should be coming together nicely and slowly reducing. Add the vegetables and return the stew to the heat, give it a good stir and cover, then cook for another 30 minutes. Mix up the dumplings.
5. To make the dumplings, pour the flour into a large bowl, add the butter and rub it in until it resembles breadcrumbs.
6. Add the herbs and the egg, and mix with your hand, adding just enough milk so that the mixture comes together in a sticky dough.
7. Check the stew, it should have reduced considerably making a thick, rich gravy; if it is too dry add a little water or stock. Give it another stir and then add large spoonfuls of the dough directly onto the top of the stew. Try and place them a few centimeters apart as they will puff up as they cook. Replace the lid on and cook for another 15 minutes.
8. Check the stew. The dumplings should have puffed up and increased in size and the stew should be thick and rich. I prefer the top of my dumplings to be crispy so I buried the Dutch oven in coals and blasted it for another five minutes.
9. Then it is done. Serve quickly and eat heartily.