Beef Tenderloin without cornstarch butter

1 ounce dried porcini mushrooms 1 cup hot water 2 tablespoons butter 6 tablespoons olive oil, divided 1 small red onion, finely chopped 1 teaspoon finely[...]

1 cup boiling water 1 beef bouillon cube 1/4 cup balsamic vinegar 2 tablespoons light brown sugar 1 teaspoon olive oil 12 ounces beef tenderloin , fat[...]

1 cup boiling water 1 beef bouillon cube 1/4 cup balsamic vinegar 2 tablespoons light brown sugar 1 teaspoon olive oil 12 ounces beef tenderloin , fat[...]