Mix stock cube, salt, chillies, garlic, oil to a paste and rub over the beef brisket
Place in slow cooker in morning before work and enjoy 8 – 10 hours later
If using an oven place the brisket uncovered 160C / gas mark 3 approx. 2 - 3 hours
Add the glass of water to roasting tray or slow cooker to help steam the joint
When cooked, shred the meat using forks
To assemble warm the taco shells on a dry pan and pack with the beef brisket
Garnish the taco with some cheese, sour cream, coriander, chilli, scallion