1 1/2 pounds of beef tenderloin steaks or boneless sirloin 1/4 cup of olive oil1/4 cup of red wine vinegar1 onion, finely chopped 1/2 cup of parsley4 cloves of garlic, finely chopped 1 teaspoon of salt1 teaspoon of black pepper, freshly ground 12 bay leaves Portuguese bread, for serving