Beef Stroganoff with back

200 g streaky bacon or 200 g pancetta , diced 2 tablespoons olive oil 2 teaspoons butter 4 medium onions , sliced 2 garlic cloves , crushed 2 kg beef , sinew[...]

2 lbs beef tenderloin , cut into strips (or which ever tender cut of beef you would prefer) 2 tablespoons olive oil 4 cups water 2 (1 1/4 ounce) packages[...]

2 lbs beef tenderloin , cut into strips (or which ever tender cut of beef you would prefer) 2 tablespoons olive oil 4 cups water 2 (1 1/4 ounce) packages[...]