Sausage mushroom ragu

Name: Sausage & mushroom ragu
Ingredients: 2 tbsp olive oil; 1 carrot, grated; 3 spring onions, finely chopped; 2 garlic cloves, grated; large handful of mushrooms, finely chopped or grated; 1 tsp dried oregano; 1 tsp fennel seeds; 6 pork sausages, squeezed out of their skins; 400g can chopped tomatoes; 1 tbsp tomato ketchup; mash, pasta or couscous, to serve