Spuddy's Camp Beef Casserole

Cut the beef into cubes
Heat the oil in an large ovenproof casserole.
Add the steak and cook until browned, remove from the casserole and set aside.
Add the chopped onions, chopped carrots and crushed garlic cook until softened.
Return the steak, add the tomatoes, wine, herbs, tomato puree and seasoning.
Bring to the boil.
Reduce to a simmer, cover and cook for 2 hours.
Add the mushrooms cover and return to the oven for a further 30 minutes.
Adjust seasoning to taste.