Chop up the carrot, celery and onion. I use the Zyliss food chopper to chop it all mess free and easily.
Add a good drizzle of olive oil to the pan and add the sofrito veg mix. Cook over a medium heat so the veg softens and becomes aromatic.
Take 2 portobello mushrooms and pull the large stalks out of the middle.
Load up one mushroom with pine nuts, cheese and sultanas.
Place the other mushroom on top to form a burger. Use butchers string to tie the mushroom together. Be aware that the mushroom will shrink when cooking so make sure it is tight.
Place the mushroom bomb in with the sofrito.
Pour over a glass of wine and simmer until the wine has evaporated.
Add the passata, sugar, salt, basil and the tomato puree and give it all a good mix.
Turn the heat down as low as it goes, place the lid on and leave to simmer for 2 hours. After 1 hour 45 minutes take the lid off to let the sauce thicken.
Serve with pasta or just about any dish that needs a rich vibrant tomato sauce.