Preparation
Firstly put water, ketchup, tomato paste, brown sugar, vinegar, mustard, and salt in a slow cooker without forget to mix them step by step , stirring to dissolve brown sugar and salt.
Put short ribs into the sauce and stir to coat. Adjust cooker on Low, cover, and cook for 8 hours.

Enjoy!

Preparation
Firstly put water, ketchup, tomato paste, brown sugar, vinegar, mustard, and salt in a slow cooker without forget to mix them step by step , stirring to dissolve brown sugar and salt.
Put short ribs into the sauce and stir to coat. Adjust cooker on Low, cover, and cook for 8 hours.

Enjoy!