Beef with potatoes

flour , for dredging salt black pepper 2 1/2 lbs beef tips 2 tablespoons olive oil 1 lb mushroom , sliced thick 1 onion , quartered pole-to-pole and sliced[...]

2 1/2 lbs beef chuck or 2 1/2 lbs beef rump, cut into 1 1/2 inch cubes 1 1/2 cups onions , chopped 1 cup celery , sliced 2 cups carrots , sliced 2 cups[...]