First of all, brew coffee in a convenient way for you.
Put the ketchup, olive oil, and balsamic vinegar in a marinating dish.
Pour in the soy sauce and strained coffee.
Add, if necessary, a pinch of salt and a generous portion of freshly ground black pepper.
Marinate the shins for at least an hour, preferably 3.
After a while, put the shins together with the marinade in a baking dish.
And send it to the oven for 40 minutes at 180 * C.