Cut the lamb into 2 cm cubes and remove fat and tendons. Cut the onions, carrots and celery into small cubes and sauté them with the bay leaves and rosemary in a little olive oil in an ovenproof saucepan until it has turned color but is still firm to the bite. The meat is dusted with a little flour and then added to the vegetables with the wine and canned tomatoes. Season with salt, pepper and a little tomato paste, stir well and bring to a simmer with the lid closed.
Put the pot in the oven for 1 1/2 hours. Take the lid off the pot for the last half hour. Season again to taste, remove the bay leaves and rosemary and serve hot with baguette or potatoes.