Slice mushrooms into bite sized pieces about 1cm (1/2in) thick. Leave stems on.

Heat a large frying pan on a medium high heat. When the pan is hot add the butter and 2 tablespoons olive oil. Add mushrooms and cook, stirring every few minutes until mushrooms are browned and cooked through. At first it will seem like the mushrooms won’t fit but they will cook down quickly.

Remove mushrooms from the pan and place in a clean bowl. Remove sausage casings and break meat into bite sized chunks. Add sausage meat to the pan with cumin seeds (if using). Cook on a medium high heat, stirring often until the meat is cooked through and browned.

Return mushrooms to the pan. Add crumbled feta and cook for another minute to warm them.

Remove the pan from the heat and stir in balsamic. Taste and season with salt and more balsamic if needed. Serve in deep bowls with chopped herbs on top.