Cut beef brisket into 6 large pieces which I did not trim in order to add flavor.
Heat olive oil in large 8 quart pan.
Add brisket pieces and brown; then remove from pan.
Add all the vegetables, thyme and marjoram and saute for 10 minutes.
Return meat to pan with sauteed vegetables.
Add tomato paste, chicken stock and beer.
Stir well and bring to a boil, stirring frequently.
Reduce heat to low and cook for 3-4 hours, stirring occasionally.