For best results, use the the Ultimate Cook™ 6 in 1 by Breville

Use the MENU button to select HIGH SEAR. Select POWER/START to commence pre-heating the slow cooker. Add the olive oil, then cook the chicken until golden brown on both sides, 3-4 minutes, Then add the onions and garlic and sweat down till tender (about 4-6 minutes).

Add the chicken stock, salt and pepper, basil, diced tomato, passata and mushrooms and bring up to the boil.

Scatter the olives & pour the lemon juice over the casserole.

Add the remainder of the marinade. Cover with lid. Use the MENU button to select SLOW COOK HIGH. Adjust the timer to 4 hours and press POWER/START to start cooking. If you want to put on before work, place on SLOW COOK LOW and cook for 8 hours