Wash the liver and cut into walnut-sized pieces. Peel the onions and cut into strips. Dice the tomatoes. Dice the bacon and finely mash the garlic.
Fry the bacon in a pan and add the liver. Fry for 2 minutes. Take both out and add the onions to the pan and sweat until golden.
Add the liver, garlic and tomatoes and grate the thyme over it. Steam for 3 minutes and add the brandy. Light this and let it burn down. Serve with the baguette.