Lightly Coat The Inside Of A Slow Cooker With Olive Oil And Place The Brisket In The Bottom Of The Cooker. Sprinkle In The Onion, Garlic, And Basil; Season With Salt And Pepper. Pour The Chicken Broth And Water. Cook On Low, Covered, Until Brisket Is Tender, 6 To 10 Hours, Basting Meat Several Times To Moisten.