Cover the base of a heavy-bottomed frying pan with a thin film of oil and set over a medium-high heat. Add the sausages and cook, turning regularly, for about 5 minutes, until they start to brown. Remove from the pan and set aside.
Turn the heat down to medium and add some more oil if necessary to cover the bottom of the pan. Once the oil has heated up, add the potatoes, ½ teaspoon of the chilli flakes and ½ teaspoon of the paprika as well as some black pepper. Sauté, turning occasionally, until the potatoes start to turn golden brown.
Add the green pepper, onion and mushrooms as well as the remaining chilli flakes and paprika. You may need some more oil again at this stage. Cook for about 20 minutes, until the potatoes are cooked through and the peppers have softened. Keep an eye on the heat, as you may need to reduce it.
Finally, add the sausages back to the pan and cook for 5 minutes. Serve with fried eggs and garnish with snipped fresh chives.